12-Letter Words Starting With O
419 12-letter words start with the letter O, including organization, occasionally, organisation, overwhelming. Every word below is valid in Scrabble-style word games.
Highest scoring
- objectifying30
- ozonizations30
- overequipped29
- objectivisms28
- overanalyzed28
- oropharynxes27
- overanalyzes27
- oxyacetylene27
Standard letter values, public-domain ENABLE list, not the official tournament dictionary.
The full list419
oafishnessesoarsmanshipsobduratenessobfuscationsobjectifyingobjectivismsobjectivistsobjurgationsoblanceolateoblatenessesobligatorilyobligingnessobliteratingobliterationobliterativeobliteratorsobnubilatingobnubilationobscurantismobscurantistobscurationsobsequiouslyobservationsobsolescenceobsoletenessobstetricianobstreperousobstructionsobstructivesobtusenessesoccasionallyoccidentallyoccultationsoccupationaloceanographyoceanologiesoceanologistochlocraciesoctahedrallyoctapeptidesoctogenarianoctosyllabicoctosyllableodiousnessesodontoblastsofficeholderofficialdomsofficialesesofficialismsofficiationsoffishnessesoffscouringsoleaginouslyoleandomycinoleoresinousolfactometeroligarchicaloligochaetesoligophagiesoligophagousoligopsoniesoligotrophicomnipotencesomnipotentlyomnipresenceomnisciencesomniscientlyomnivorouslyoncogenicityoncornavirusonomasticianonomatopoeiaonomatopoeiconychophoranoophorectomyopalescencesopalescentlyopaquenessesopenhandedlyoperaticallyoperationismoperationistoperatorlessopinionativeopportunismsopportunistsopposabilityoppositenessoppositionaloppressivelyoptimalitiesoptimisationoptimizationoptometristsoratoricallyorchestrallyorchestratedorchestraterorchestratesorchestratororchidaceousordinarinessorganicitiesorganisationorganizationorganolepticorganologiesorientalismsorientalistsorientalizedorientalizesorientationsorienteeringoriginationsorismologiesornamentallyornatenessesornerinessesornithologicornithoptersorographicaloropharyngesoropharynxesorotunditiesorthocentersorthodontiasorthodonticsorthodontistorthogenesesorthogenesisorthogeneticorthogonallyorthographicorthopaedicsorthopedistsorthopteransorthopteristorthopteroidorthorhombicorthotropousoscillationsoscillogramsoscillographoscilloscopeosmolalitiesosmolaritiesossificationostentationsostentatiousosteoblasticosteoclasticosteogenesesosteogenesisosteologicalosteologistsosteomalaciaosteopathiesosteoplasticosteoporosesosteoporosisosteoporoticosteosarcomaostracodermsotherworldlyotiosenessesotosclerosesotosclerosisoutachievingoutbalancingoutbargainedoutbreedingsoutbuildingsoutcavillingoutcompetingoutcroppingsoutdatednessoutdeliveredoutdesigningoutdistancedoutdistancesoutgeneraledoutglitteredoutgoingnessoutintriguedoutintriguesoutlandishlyoutmaneuversoutnumberingoutorganizedoutorganizesoutperformedoutplacementoutpoliticksoutpopulatedoutpopulatesoutpreachingoutproducingoutpromisingoutrageouslyoutreboundedoutreproduceoutrivallingoutsidernessoutsourcingsoutsparklingoutspreadingoutsprintingoutstretchedoutstretchesoutstrippingoutthrobbingoutthrustingoutwrestlingovariotomiesoverabstractoverabundantoverachievedoverachieveroverachievesoveractivityoveranalysesoveranalysisoveranalyzedoveranalyzesoverarousalsoverarrangedoverarrangesoverassertedoverbalancedoverbalancesoverbleachedoverbleachesoverborrowedoverbrowsingoverbuildingoverburdenedovercapacityovercastingsovercautionsovercautiousoverchargingoverchillingoverclaimingoverclassifyovercleaningoverclearingovercloudingovercoachingovercompressoverconcernsoverconsumedoverconsumesovercontrolsovercorrectsovercountingovercrammingovercriticalovercroppingovercrowdingoverdecorateoverdesignedoverdevelopsoverdirectedoverdiscountoverdocumentoverdominantoverdramaticoverdressingoverdrinkingovereducatedovereducatesoveremphasesoveremphasisoveremphaticoverenamoredoverengineeroverenrolledoverequippedoverestimateoverexcitingoverexerciseoverexertingoverexertionoverexpandedoverexplainsoverexplicitoverexploitsoverexposingoverexposureoverextendedoverfamiliaroverfatiguedoverfatiguesoverfavoringoverfocusingoverfocussedoverfocussesoverfulfillsovergarmentsovergenerousovergovernedoverhandlingoverharvestsoverhuntingsoveridealizeoveridentifyoverindulgedoverindulgesoverinflatedoverinflatesoverinformedoverinsuringoverissuanceoverlaboringoverlearningoverlengthenoverlightingoverliteraryoverlordshipovermanagingovermanneredovermasteredovermatchingovermaturityovermedicateovermodestlyovernightersovernightingoveroperatedoveroperatesoveroptimismoveroptimistoverorganizeoverornamentoverpackagedoverpackagesoverpaymentsoverpedalingoverpedalledoverpeoplingoverpersuadeoverplanningoverplantingoverplottingoverpopulateoverpoweringoverpraisingoverpressureoverprintingoverproducedoverproducesoverprogramsoverpromisedoverpromisesoverpromotedoverpromotesoverprotectsoverreachersoverreachingoverreactingoverreactionoverregulateoverrelianceoverreportedoverrespondsoversanguineoversaturateoverservicedoverservicesovershadowedovershootingoversimplifyoverslaughedoversleepingoverslippingoverspendersoverspendingoverstaffingoversteppingoverstirringoverstockingoverstrainedoverstressedoverstressesoverstrewingoverstriddenoverstridingoverstrikingoverstuffingoversuppliedoversuppliesoversweetensoverswingingovertaxationoverthinkingoverthrowingovertightensovertrainingovertreatingovertrimmingovertrumpingoverutilizedoverutilizesovervoltagesoverwateringoverweighingoverweightedoverwhelmingoverwinteredoverwithheldoverwithholdovipositionsowlishnessesoxalacetatesoxaloacetateoxyacetyleneoxygenationsozonizationsozonospheres