11 letter words with O
Every eleven-letter word that contains O, grouped by where the O sits, with Scrabble and Words With Friends scores shown separately, Wordle letter stats, definitions and filters.
O can sit in any slot · 20600 words in our list
The short answer
There are 20600 eleven words with O in this list. O is most often the second letter, and the most common last letter is S. The top face-value Scrabble score is 40 for quizzacious.
20600eleven O words in our list
1%start with O
31%end in S, mostly plurals
17.8average Scrabble face score
Only words that begin with O? See words that start with. Any length? Use words with letter.
The complete list
All 11 letter words with O
Grouped by where O first appears. The small number is the face-value Scrabble score.
O is the 1st letter (157)
oariopathic18oarsmanship18obcordiform21obdormition16obdurations14obediential14obedientiar14obesenesses13obfuscating19obfuscation18obfuscators18obfuscatory21obituarists13objectation22objectative25objectified26objectifies25objectional22objectioner22objectivate25objectively28objectivise25objectivism27objectivist25objectivity28objectivize34objectizing32objurations20objurgating22objurgation21objurgative24objurgators21objurgatory24objurgatrix28oblationary16oblectation15obligations14obligedness15obligements16obliquation22obliqueness22obliquities22obliquitous22obliterable15obliterated14obliterates13obliterator13obliviality19oblivionate16oblivionist16oblivionize25obliviously19oblongitude15obmutescent17obnoxiously23obnubilated16obnubilates15oboormition15obpyramidal21obsceneness15obscenities15obscurantic17obscuration15obscurative18obscuratory18obscurement17obscureness15obscurities15obsecrating16obsecration15obsecratory18obsequeence24obsequience24observables18observances18observandum19observantly19observation16observative19observators16observatory19observingly20obsessingly17obsessional13obsessively19obsidianite14obsidionary17obsignating15obsignation14obsignatory17obsolescent15obsolescing16obsoletions13obsoletisms15obstetrical15obstinacies15obstinately16obstination13obstinative16obstipation15
O is the 2nd letter (4393)
aortectasia13aortectasis13aortoclasia13aortoclasis13aortography20aortoptosia13aortoptosis13boardsailer14boardsailor14boarishness16boatbuilder16boatlifting17boatloading15boatmanship20boatsteerer13bobbleheads21bobbysoxers27bobsledders17bobsledding18bobsleighed20bobsleigher19bocconcinis19bodaciously19bodefulness17bodhisattva20bodhisattwa20bodicemaker22bodybending21bodyboarded21bodyboarder20bodybuilder20bodychecked29bodyguarded20bodyshapers22bodysurfers20bodysurfing21bodyworkers24boeremusiek19boereworses16bogginesses15boggishness18bogtrotters14bogtrotting15bogusnesses14bohemianism20boilerhouse16boilermaker19boilerplate15boilersmith18boilersuits13boilerworks20boilinglike18bokmakierie23boldfacedly23boldhearted18bolectioned16boletaceous15bollockings20bollocksing20bolographic21bolometries15bolshevised20bolshevises19bolshevisms21bolshevists19bolshevized29bolshevizes28bolsterings14bolsterwork20boltheading18bombacaceae21bombardelle18bombardiers18bombardment20bombastical19bombilating18bombilation17bombinating18bombination17bombonieres17bombproofed23bombyciform27bombycinous22bombyliidae21bonapartean15bonapartism17bonapartist15bonaventure16bonbonniere15bondholders18bondholding19bondmanship21bondservant17bonebreaker19bonefishing20bonesetters13bonesetting14boneshakers20bonhomously21bonkbusters19
O is the 3rd letter (2402)
abolishable18abolishment18abolitional13abominating16abomination15abominators15abonnements15aboriginals14aboriginary17aborticides16abortionist13abortogenic16abortuaries13abouchement20aboundingly18aboveground18abovestairs16acocanthera18acoelomates15acolouthite16acotyledons17acouophonia18acoustician15agomphiasis19agoniatites12agonisingly16agonistarch17agonistical14agonizingly25agonostomus14agonothetes15agonothetic17agoraphobes19agoraphobia19agoraphobic21akoluthoses18alogotrophy20alonenesses11aloofnesses14amobarbital17amoebicidal18amoebocytes20amoeboidism18amontillado14amoralities13amorosities13amorousness13amorphinism20amorphously21amortisable15amortisseur13amortizable24amovability21amoxicillin22amoxycillin25anocithesia16anodisation12anodization21anoegenetic14anointments13anomalistic15anomalonomy18anomalously16anomodontia14anomoeanism15anomoeomery18anomphalous18anonymisers16anonymising17anonymities16anonymizers25anonymizing26anonymously19anoperineal13anopheleses16anophelinae16anophelines16anoplanthus16anoplothere16anorthitite14anorthosite14anosognosia12anosphrasia16anosphresia16anotherkins18anovulation14anovulatory17anoxidative22anoxybiosis23anoxybiotic25apoatropine15apocaffeine21apocalypses20apocalyptic22apochromats20apocopating18apocopation17apocrisiary18apocryphate23apocynaceae20
O is the 4th letter (2610)
abdominales16abdominalia16abdominally19abhominable20abhorrences18abhorrently19abiogeneses14abiogenesis14abiogenetic16abiogenists14abiological16abiotically18abiotrophic20abnormalise15abnormalism17abnormalist15abnormality18abnormalize24abnormities15abrogations14absolutions13absolutised14absolutises13absolutisms15absolutista13absolutists13absolutives16absolutized23absolutizes22absolvatory19absolvitors16absolvitory19absorbances17absorbingly19absorbition15absorptance17absorptions15accommodate20accompanied20accompanier19accompanies19accompanist19accomplices21accomplisht22accomptable21accomptants19accordances18accordantly19accordatura16accordature16accordingly20accorporate17accoucheurs20accoucheuse20accountable17accountably20accountancy20accountants15accountings16accountment17accouraging17accoutering16achondrites17achondritic19acroamatics17acrobatical17acrobatisms17acrocarpous17acrocentric17acrocephaly23acroceridae16acrochordon19acroclinium17acrodactyla19acrodontism16acrodromous16acromegalia16acromegalic18acromphalus20acromyodian19acromyodous19acronically18acronycally21acronychous21acronyctous18acronymania18acronymized28acropetally18acrophobias20acrophobics22acrophonies18acropolises15acropolitan15acrorrheuma18acrospiring16acrosporous15acrostichal18acrostichic20acrostichum20acrosticism17
O is the 5th letter (3297)
abscondedly20abscondence18abscondings17acarologies14acarologist14acarophobia20accroaching21acesodynous17acetoacetic17acetobacter17acetometers15acetometric17acetonaemia15acetonaemic17acetonation13acetonemias15acetonurias13acetophenin18acetopyrine18acetotoluid14achloropsia18achroanthes19achroglobin19achromacyte23achromatins18achromatise18achromatism20achromatium20achromatize27achromatope20achromatous18acidometers16acidophiles19acidophilic21acidophilus19acknowledge22acquophonia27actionizing23acutonodose14adelocerous14adelochorda18adenochrome19adenodermia15adenogenous13adenography21aetiologies12aetiologist12aetiotropic15affrontedly21affrontings18affrontment19agamogonies15agamospermy21agglomerant15agglomerate15aggroupment17agriologies13agriologist13agyrophobia22airboarding15airworthier17aitiotropic15alamodality17alchochoden22alcyonacean18alcyonarian16alcyoniform21alprostadil14alstonidine12alveolation14alveoliform19alveolotomy19alycompaine20amatorially16amazonstone22ambrosially18ambrosterol15amebobacter19ameloblasts15amenorrheal16amenorrheas16amenorrheic18amenorrhoea16ametoecious15amidoacetal16amidoacetic18amidocapric20amidohexose24amidoketone18amidomyelin19amidophenol19amidopyrine19aminoacetal15aminoacetic17aminobutene15aminoformic20aminoketone17aminomyelin18aminophenol18aminopterin15
O is the 6th letter (2348)
abandonable16abandonedly18abandonment16abandonware17abelmoschus20aberrometer15aberroscope17ablutomanes15acettoluide14acrimonious15actaeonidae14actinoblast15actinodrome16actinograph19actinolites13actinolitic15actinologue14actinomeres15actinomeric17actinometer15actinometry18actinomyces20actinomycin20actinophone18actinophore18actinophrys21actinopteri15actinoscopy20actinostome15actinozoans22adaptogenic17adaptometer16addisoniana13aetheogamic19aficionadas17aficionados17agathodemon18aglycosuric19agritourism14agritourist12ahistorical16aichmophobe25ailuromania13ailurophile16ailurophobe18airdropping17airproofing17albedograph20albedometer16albitophyre21albumoscope19albumosuria15alcicornium17alectorides14alectorioid14alethopteis16alethoscope18aleurodidae13aleuromancy18aleurometer13aleuroscope15aleyrodidae16alkalometry20allegorical14allegorised13allegoriser12allegorises12allegorists12allegorized22allegorizer21allegorizes21allelomorph18allelopathy19allelotropy16allemontite13altiloquent20amblyoscope22ambulomancy22ameliorable15ameliorants13ameliorated14ameliorates13ameliorativ16ameliorator13amethodical19ametrometer15amminolysis18amminolytic20amperometer17amphioxidae26amphioxides26amphioxuses25anachorisms18anacrogynae17anaemotropy18anaerobiont13anaerobious13anaerophyte19anagnorises12anagnorisis12
O is the 7th letter (1799)
ablutionary16acanthodean17acanthodian17acanthodini17acanthology20acanthophis21acanthopore18accessorial15accessories15accessorily18accessorise15accessorius15accessorize24accustomary20accustoming18accustomize26achaenocarp20acichloride19acidulously17acrindoline14acutilobate15adaptionism16additionary16additionist13adelphogamy23adelpholite17aesthiology18afficionado20afterbodies17aftercoming19aftercooler16aftercourse16afterworlds18agapemonian16agapemonist16agapemonite16agitatorial12agitpropist16aglyphodont21agriproduct17agrypnotics19aigialosaur12alacriously16albatrosses13albiflorous16alethiology18allantoidal12allantoidea12allantoides12allantoises11allergology16allicholies16alphasorted17alphatoluic18alprazolams24aluminosity16aluminotype18amanitopsis15ambagiosity19ambagiously19ambiguously19ambitioning16ambitionist15ambitiously18amblygonite19amblypodous21ametabolian15ametabolism17ametabolous15ampherotoky25amphibolies20amphiboline20amphibolite20amphibology24amphibolous20amphigonium21amphigonous19amphigories19amphigouris19amphilogism21amphimorula20amphipodous21amphitokous22amphivorous21amphizoidae28ampullosity18anachronism18anachronist16anachronize25anachronous16anacreontic15anamnionata13anastrophes16anastrophia16anastrozole20anaxagorean19anaxagorize28ancestorial13ancestoring14anchylosing20
O is the 8th letter (945)
abarthrosis16abruptiones15accessional15accessioned16accessioner15adderstones13adenectopia16adenectopic18aesthesodic17affectional19affectioned20affettuosos17aftergrowth21aftershocks23afunctional16aganglionic15agitational12agkistrodon17agranuloses12agranulosis12albuminoids16albuminosis15alienicolae13allhallowen17alligatored13alpenstocks19alteregoism14ambulatoria15amphibiotic22amphidromia21amphidromic23amphierotic20amphiploids21amphiploidy24amphiprotic22amphistomum22amphitropal20amygdaloids19anadicrotic16anadiploses14anadiplosis14anaematosis13ananepionic15anapleroses13anaplerosis13anaplerotic15anarthropod17anarthrosis14ancistrodon14angiectopia16anhematosis16anhemitonic18animatronic15anisalcohol16aniseikonia15aniseikonic17anthracoses16anthracosis16anthracotic18anthracoxen23anthypnotic21antialcohol16antibigotry17antibubonic17anticlnoria13antidivorce17antiheroine14antiheroism16antijacobin22antiketogen16antimasonic15antimasonry16antimitotic15antimycotic20antinepotic15antipyrotic18antistrophe16antisudoral12antitumoral13antivirotic16antizymotic27apanthropia18aparthrosis16applegrower19appressoria15arachidonic19aryballoses16arytaenoids15ascensional13assertional11astraphobia18astraphobic20birthstones16bisectional15bitterroots13bitterwoods17bituminosis15blackamoors21blackthorns22blamestorms17
O is the 9th letter (1686)
abdications16aberrations13abietineous13abjunctions22abjurations20ablatitious13ablepharous18abnegations14abranchious18abreactions15abscessroot15abscissions15abstentions13abstentious13abstersions13abstractors15acalycinous18acarpellous15acclamatory20acclivitous18accubations17accusations15acervations16acetabulous15acidiferous17acierations13acinaciform20acinetiform18acquisitors22acraspedote16activations16adaptations14addititious13aestivators14affirmatory22affixations24afflictions19afterchrome21afterschool19agariciform19agatiferous15agglutinoid14aggregators14aggregatory17aggressions13agregations13alabastrons13albugineous14alienations11alineations11alismaceous15alisphenoid17alkylations18allegations12alleviators14alleviatory17alligations12alsinaceous13alterations11alternators11alumiferous16aluminiform18aluniferous14amadelphous19amaranthoid17ambassadors16ambilaevous18ambulations15ambuscadoed19ambuscadoes18amentaceous15americanoid16ammunitions15ampelideous16amphibryous23amphichroic25amphichrome25amphichromy28amphictyons23amphictyony26amphigamous21amphigenous19amphiphloic25ampliations15ampulliform20amputations15amyliferous19anacanthous16anallantoic13anantherous14anatiferous14andranatomy17anelectrode14anfractuose16anfractuous16angulations12anhelations14animalivora16animalivore16anisandrous12
O is the 10th letter (921)
abacination15abbreviator18aberuncator15abjudicator23ablactation15absentation13abstraction15abstriction15acacatechol20accelerator15accentuator15acceptation17accersition15acclamation17acclimation17accumulator17accurtation15acetylation16acetylsalol16acidulation14acquisition22acumination15adelantados13adenization21aestivation14affectation19affiliation17affirmation19affrication19aftervision17afterwisdom20aggradation14aggravation16aggregation14alderperson14alimenation13alkanethiol18allegrettos12alleviation14allineation11alliterator11alluviation14alniresinol11alniviridol15altercation13alternation11amalgamator16ambiversion18aminization22amphikaryon25amphithuron21amphithyron24amplexation22amplication17analysation14analyzation23anastasimon13anastasimos13angariation12angwantibos17anhydration18annihilator14annullation11annunciator13anteflexion21anteversion14anthesterol14anthratriol14anthraxylon24anticipator15anticnemion15anticreator13antiemperor15antifaction16antifashion17antimension13antiminsion13antimission13antineutron11antinucleon13antipatriot13antiquation20antiseption13apiculation15appellation15applanation15application17appreciator17arabisation13arabization22arbitration13articulator13asclepieion15aspergation14asphyxiator26assecurator13assentation11assignation12assimilator13auscultator13
O is the 11th letter (42)
accelerando16accrescendo18affrettando18alfilerillo14alternativo14animalillio13canafistulo16capriccetto19caudillismo16cinquecento24circumlitio17cuadrillero14decrescendo17demirilievo17descamisado17embarcadero18embarricado18esperantido14estampedero16estranghelo15impressario15indigenismo15internuncio13juramentado21larghissimo17legatissimo14martellando14necessitudo14prestissimo15pseudembryo21punchinello18quirquincho34rallentando12rifacimento18saltimbanco17serenissimo13stalkerazzo33tetrakisazo24trullisatio11unalachtigo17vespertilio16whiskerando22
Words with two Os (6224)
aberroscope17abiological16abiotrophic20abolitional13abomination15abominators15abortionist13abortogenic16aboveground18abrogations14abscessroot15absolutions13absolvatory19absolvitors16absolvitory19absorbition15absorptions15acanthology20acanthopore18acarologies14acarologist14acarophobia20accommodate20accorporate17acesodynous17acetonation13acetotoluid14achloropsia18achroglobin19achromatope20achromatous18acoelomates15acolouthite16acotyledons17acouophonia18acquophonia27acrimonious15acrocarpous17acrochordon19acrodontism16acrodromous16acromyodian19acromyodous19acronychous21acronyctous18acrophobias20acrophobics22acrophonies18acropolises15acropolitan15acrosporous15acrostolion13acrostolium15acrotrophic20actinodrome16actinologue14actinophone18actinophore18actinoscopy20actinostome15actinozoans22actomyosins18acutonodose14adelocerous14adelochorda18adenochrome19adenogenous13aeronomical15aeronomists13aerophilous16aerophobias18aerophobics20aerosolised12aerosolises11aerosolized21aerosolizes20aerostation11aerotropism15aesthiology18aetiologies12aetiologist12aetiotropic15aetomorphae18affettuosos17afficionado20aficionados17afrormosias16aftercooler16afterschool19agamogonies15agathodemon18agkistrodon17aglyphodont21agonostomus14agonothetes15agonothetic17agoraphobes19agoraphobia19agoraphobic21agriologies13agriologist13agrobiology18agroecology18agrogeology17agrological15agrologists13agronomical16agronomists14agrostology16agrotourism14agrotourist12agyrophobia22aichmophobe25ailurophobe18airproofing17aitiotropic15akoluthoses18albiflorous16albumoscope19alchochoden22alcoholemia18alcoholised17alcoholises16alcoholisms18alcoholized26alcoholizes25alcoholuria16alcoholysis19alcoholytic21alcyoniform21aldoheptose17aldohexoses22aldopentose14aldosterone12alectorioid14alethiology18alethoscope18aleuroscope15algological15algologists13algophagous18algophobias19allelomorph18allelotropy16allergology16allocations13allochroite16allochroous16allochthons19allocochick24
…and 6074 more in the full list.
Fixed start and end? Use the combine word generator. Every length for this letter lives on the words with O page.
Where does O sit?
Position of O in eleven-letter words
Words are counted by their first O, so each word appears once. Words with two Os are listed separately below.
Everyday words
Common 11 letter words with O
The full list includes rare words. These 80 are the ones you are most likely to meet in puzzles, writing and classrooms.
informationdescriptionaccessoriesapplicationperformanceassociationelectronicsappropriateresponsibleeducationalpublicationphotographyrecommendedprogrammingregulationscommunitiescompetitionimprovementintegrationdiscussionssuggestionslegislationconstitutescompetitivepreparationinstructionconnecticutcollectionsinstitutionproceedingsenforcementauthoritiesconnectionsrecognitionreservationphotographscomfortableinteractionconsultantsacquisitionconferencesconsumptiondefinitionsconsideringgovernmentsproductionspossibilityappointmentchristophercompositionimmigrationsurroundingprogressivememorabiliaexplanationinvolvementdemonstratescholarshippromotionalcommunicateprobabilitylimitationsdeclarationobservationrestorationcompilationobligationsconstructedconclusionspersonalitymethodologydistributorpopulationsexplorationprospectivepotentiallyconstraintsterritorieshospitalityprocurement
Wordle
Which letters keep company with O?
Among the 20600 words in our list, these are the eight letters that appear most often alongside O. They make good second guesses once O is confirmed.
Vowel pairs
The most common adjacent vowel pairs in these words are IO (2637), OU (1994), IA (1299), IE (801), OO (647).
Then narrow with
The Wordle solver, Wordle bot and today’s Wordle answers. For letter patterns use the word generator by pattern.
Sorted by ending
11 letter O words by last letter and last two letters
| Ends | Words | Examples |
|---|---|---|
| -S | 6428 | abarthrosis, abdications, abdominales, abelmoschus, aberrations, abhorrences, abietineous |
| -E | 2466 | abandonable, abandonware, aberroscope, abhominable, abnormalise, abnormalize, abolishable |
| -Y | 1773 | abandonedly, abdominally, abhorrently, abiotically, ablutionary, abnormality, aboriginary |
| -N | 1579 | abacination, ablactation, abomination, absentation, absorbition, abstraction, abstriction |
| -D | 1348 | aboveground, absolutised, absolutized, accessioned, accompanied, acetotoluid, acronymized |
| -C | 1207 | abiogenetic, abiotrophic, abortogenic, acetoacetic, acetometric, acetonaemic, achondritic |
| -G | 1036 | abominating, accouraging, accoutering, accroaching, accustoming, acrospiring, actionizing |
| -R | 986 | abbreviator, aberrometer, aberuncator, abjudicator, accelerator, accentuator, accessioner |
| Ends | Words | Examples |
|---|---|---|
| -ES | 1827 | abdominales, abhorrences, abiogeneses, ablutomanes, abnormities, aborticides |
| -IC | 1175 | abiogenetic, abiotrophic, abortogenic, acetoacetic, acetometric, acetonaemic |
| -US | 1078 | abelmoschus, abietineous, ablatitious, ablepharous, abranchious, abstentious |
| -ON | 1065 | abacination, ablactation, abomination, absentation, absorbition, abstraction |
| -NG | 1034 | abominating, accouraging, accoutering, accroaching, accustoming, acrospiring |
| -ED | 967 | absolutised, absolutized, accessioned, accompanied, acronymized, aerosolised |
Fixed start and end? Use the combine word generator or letter words ending with. Words that end in O itself: accelerando, accrescendo, afficionado, affrettando, alfilerillo, alternativo, amontillado, animalillio, anteportico, antitobacco
Letter patterns
O words with striking patterns
Silent O
No common silent-O words sit at this length — most eleven-letter O words sound it out.
Two Os (6224)
aberroscopeabiologicalabiotrophicabolitionalabominationabominatorsabortionistabortogenicabovegroundabrogationsabscessrootabsolutionsabsolvatoryabsolvitorsabsolvitoryabsorbition
OB and OC openers
121 words start with OB and 34 start with OC in this list.
obcordiformobdormitionobdurationsobedientialobedientiarobesenessesobfuscatingobfuscationobfuscatorsobfuscatoryobituaristsobjectationobjectativeobjectifiedobjectifiesobjectional
O with Z, X, J or Q (16)
abjudicatorabjunctionsabjurationsabnormalizeabsolutizedabsolutizesaccessorizeaccustomizeachromatizeacquisitionacquisitorsacquophoniaacronymizedactinozoansactionizingadenization
More patterns: making words from letters builds from your rack.
High scorers
Highest-scoring 11 letter words with O
| Word | Scrabble | Words With Friends |
|---|---|---|
| quizzacious | 40 | 43 |
| hexahydroxy | 38 | 34 |
| hydroxylize | 37 | 35 |
| hydroxyzine | 37 | 35 |
| schemozzled | 37 | 39 |
| showbizzier | 37 | 37 |
| buzzerphone | 36 | 39 |
| mezzolithic | 36 | 38 |
| pezizaeform | 36 | 38 |
| schemozzles | 36 | 38 |
| kolkhozniki | 35 | 36 |
| kolkhozniks | 35 | 36 |
Face-value totals before premium squares. The two games use different tile values, so each column is labeled. Check your board with the Scrabble word finder or Words With Friends cheat.
Words with meanings
4 eleven-letter O words, defined
constitutesverbthird-person singular simple present indicative of constitute
instructionnounThe act of instructing, teaching, or providing with information or knowledge.
preparationnounThe act of preparing or getting ready.
suggestionsnounplural of suggestion
Play smarter
Using eleven-letter O words in other games
Wordscapes, Text Twist, Word Cookies
Eleven-letter O words are easy bonus finds. Help is at Wordscapes solver, Text Twist solver, Word Cookies answers and Wordfeud solver.
Scrambled letters
Have eleven letters, one of them O? Try the anagram solver, jumble solver and word descrambler. Photo puzzle? 4 Pics 1 Word answers.
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Questions about 11 letter words with O
How many eleven-letter words contain O?
The general English word list used on this page has 20600 eleven-letter words with O. Counts differ between dictionaries, and Scrabble-style lists are larger, so confirm in your game’s dictionary.
Where does O usually sit in a eleven-letter word?
In this list O is the second letter of 4393, the fifth letter of 3297, the fourth letter of 2610, the third letter of 2402, the sixth letter of 2348, the seventh letter of 1799, the ninth letter of 1686, the eighth letter of 945, the tenth letter of 921, the first letter of 157, the eleventh letter of 42.
What are common eleven-letter words with O?
Everyday examples include information, description, accessories, application, performance, association, electronics, appropriate, responsible, educational. They are useful Wordle guesses because they use common letters.
Which eleven-letter O words score the most in Scrabble?
At face value the top scores are quizzacious at 40 and hexahydroxy at 38, before any bonus squares. Words With Friends uses different tile values, so totals can differ.
Are there eleven-letter words that end in O?
Yes: accelerando, accrescendo, afficionado, affrettando, alfilerillo, alternativo, amontillado, animalillio.
Which eleven-letter words have a silent O?
Silent-O words are rare at this length; most eleven words sound the O out.
How do I find eleven-letter words with O in a certain position?
Use the position selector above, or type a pattern with blanks such as _ _ _ _ _ _ _ _ _ _ O in the word generator by pattern.
What is the difference between words starting with O and words containing O?
Words starting with O must begin with it. Words containing O can have it in any slot, so the list is much longer. For the start-only list use words that start with.