12-Letter Words Starting With O

There are 452 12-letter words that start with O. 146 are common words, such as OAFISHNESSES and OBDURATENESS. A rarer one is OZONOSPHERES. In this set, E is the most frequent open letter (377 words). 109 words contain a doubled letter.

Full list 452

Common words

oafishnessesobduratenessobfuscationsobjectifyingobjurgationsobligatorilyobliteratingobliterationobscurantismobscurantistobsequiouslyobservations
oafishnessesobduratenessobfuscationsobjectifyingobjurgationsobligatorilyobliteratingobliterationobscurantismobscurantistobsequiouslyobservationsobsolescenceobstetricianobstreperousobstructionsobtusenessesoccasionallyoccupationaloceanographyoceanologiesoctogenarianodiousnessesofficeholderofficialdomsofficialismsoleomargarinoligarchicalomnipotencesomnipresenceomnisciencesomnivorouslyonomatopoeiaonomatopoeicopalescencesopaquenessesoperaticallyopportunismsopportunistsoppressivelyoptimizationoptometristsoratoricallyorchestratedorchestratesordinarinessorganizationorientationsoriginationsornatenessesornerinessesorotunditiesorthodontiasorthodonticsorthodontistorthographicorthopaedicsorthopaedistorthopedistsoscillationsoscilloscopeossificationostentationsostentatiousosteopathiesosteoporosesosteoporosisotherworldlyoutbalancingoutbuildingsoutcroppingsoutdistancedoutdistancesoutlandishlyoutmaneuversoutmanoeuvreoutnumberingoutperformedoutplacementoutproducingoutrageouslyoutsourcingsoutspreadingoutstretchedoutstretchesoutstrippingoverabundantoverachievedoverachieveroverachievesoverbalancedoverbalancesoverbuildingoverburdenedovercapacityovercautiousoverchargingovercloudingovercriticalovercrowdingoverdecorateoverdevelopsoverdressingoveremphasesoveremphasisoverestimateoverexcitingoverexerciseoverexertingoverexertionoverexposingoverexposureoverextendedovergenerousoverindulgedoverindulgesovermasteredoveroptimismoverpopulateoverpoweringoverpraisingoverprintingoverproducedoverproducesoverprotectsoverreachingoverreactingoverreactionoversamplingovershadowedovershootingoversimplifyoversleepingoverspendingoverspillingoversteppingoverstockingoversuppliedoversuppliesoverthinkingoverthrowingoverwhelmingoverwinteredoxidizationsoxyacetyleneoxygenationsoarsmanshipsoblatenessesobligingnessobliterativeobmutescenceobsoletenessoctosyllabicoctosyllableodontologistoenophilistsofficialesesofficiationsolericultureoligochaetesomnipotentlyomniscientlyoncogenicityoneirocriticonomasiologyoophorectomyopenhandedlyophthalmitisopinionativeopposabilityoppositenessoppositionalorbicularityorchestrallyorchestratororchidaceousorchidectomyorganographyorgasmicallyorgasticallyorientalistsorientalizedorientalizesorienteeringornamentallyornithologicornithomancyorographicalorthodontureorthogenesisorthogeneticorthogonallyorthopteransorthopterousorthorhombicorthotropousoscillogramsoscillographosteogenesisosteomalaciaosteoplasticosteoporoticostracodermsoutgeneraledoverambitionoverattachedovercastingsovercroppingoverdesirousoverdetailedovereducatedoveremphaticoverexplicitoverfamiliaroverfancifuloverfatiguedoverinflatedoverinterestovermatchingovermedicateoverpowerfuloverpressureoverregulateoverridinglyoverspecificoverstrainedoverstressedoverstressesoverstuffingoversubtletyovertaxationovertrumpingoverwearyingoxycephaliesobjectivismsobjectivistsoblanceolateobliteratorsobnubilatingobnubilationobscurationsobstructivesoccidentallyoccultationsoceanologistochlocraciesoctahedrallyoctapeptidesodontoblastsoffishnessesoffscouringsoleaginouslyoleandomycinoleoresinousolfactometeroligophagiesoligophagousoligopsoniesoligotrophiconcornavirusonomasticianonychophoranopalescentlyoperationismoperationistoperatorlessoptimalitiesoptimisationorchestraterorganicitiesorganisationorganolepticorganologiesorientalismsorismologiesornithoptersoropharyngesoropharynxesorthocentersorthogenesesorthopteristorthopteroidosmolalitiesosmolaritiesosteoblasticosteoclasticosteogenesesosteologicalosteologistsosteosarcomaotiosenessesotosclerosesotosclerosisoutachievingoutbargainedoutbreedingsoutcavillingoutcompetingoutdatednessoutdeliveredoutdesigningoutglitteredoutgoingnessoutintriguedoutintriguesoutorganizedoutorganizesoutpoliticksoutpopulatedoutpopulatesoutpreachingoutpromisingoutreboundedoutreproduceoutrivallingoutsidernessoutsparklingoutsprintingoutthrobbingoutthrustingoutwrestlingovariotomiesoverabstractoveractivityoveranalysesoveranalysisoveranalyzedoveranalyzesoverarousalsoverarrangedoverarrangesoverassertedoverbleachedoverbleachesoverborrowedoverbrowsingovercautionsoverchillingoverclaimingoverclassifyovercleaningoverclearingovercoachingovercompressoverconcernsoverconsumedoverconsumesovercontrolsovercorrectsovercountingovercrammingoverdesignedoverdirectedoverdiscountoverdocumentoverdominantoverdramaticoverdrinkingovereducatesoverenamoredoverengineeroverenrolledoverequippedoverexpandedoverexplainsoverexploitsoverfatiguesoverfavoringoverfocusingoverfocussedoverfocussesoverfulfillsovergarmentsovergovernedoverhandlingoverharvestsoverhuntingsoveridealizeoveridentifyoverinflatesoverinformedoverinsuringoverissuanceoverlaboringoverlearningoverlengthenoverlightingoverliteraryoverlordshipovermanagingovermanneredovermaturityovermodestlyovernightersovernightingoveroperatedoveroperatesoveroptimistoverorganizeoverornamentoverpackagedoverpackagesoverpaymentsoverpedalingoverpedalledoverpeoplingoverpersuadeoverplanningoverplantingoverplottingoverprogramsoverpromisedoverpromisesoverpromotedoverpromotesoverreachersoverrelianceoverreportedoverrespondsoversanguineoversaturateoverservicedoverservicesoverslaughedoverslippingoverspendersoverstaffingoverstirringoverstrewingoverstriddenoverstridingoverstrikingoversweetensoverswingingovertightensovertrainingovertreatingovertrimmingoverutilizedoverutilizesovervoltagesoverwateringoverweighingoverweightedoverwithheldoverwithholdovipositionsowlishnessesoxalacetatesoxaloacetateozonizationsozonospheres

About this list

Words
452 (146 common words)
Common example
oafishnesses
Rare example
ozonospheres
Doubled letters
109
Ending in S
164
Most frequent letter
E (377)

Questions

How many 12-letter words starting with o are there?

452. 146 of them are common words.

What is a common example?

OAFISHNESSES is among the common words in this set.