15-Letter Words Matching ____O__________

There are 446 15-letter words that match ____O__________. 83 are common words, such as ACKNOWLEDGEMENT and ACKNOWLEDGMENTS. A rarer one is VISIONARINESSES. In this set, I is the most frequent open letter (389 words). 111 words contain a doubled letter.

Full list 446

Common words

acknowledgementacknowledgmentsairworthinessesanalogousnessesappropriatenessastrophysicistsauthoritativelycomfortablenesscosmopolitanismdiscombobulateddiscombobulatesdisconcertingly
acknowledgementacknowledgmentsairworthinessesanalogousnessesappropriatenessastrophysicistsauthoritativelycomfortablenesscosmopolitanismdiscombobulateddiscombobulatesdisconcertinglydiscontentmentsdiscontinuancesdiscontinuationdiscontinuitiesdiscontinuouslydiscountenanceddiscountenancesdiscouragementsdissolutenesseselaboratenessesexplosivenessesfrivolousnesseshistoriographerhydrocephalusesimprobabilitiesimprovisationalintrospectivelyinviolabilitiesmicroaggressionmicrobiologicalmicrobiologistsmicroelectronicmicromanagementmicrometeoritesmicroprocessorsmicroscopicallymisconstructionnationalizationneocolonialismsneocolonialistsneoconservativenitrocellulosesnitroglycerinesnoncommunicablenonconformitiesnonconstructivenoncontributingnoncontributorynoncooperationsnongovernmentalpaleontologistspersonificationphilosophicallyphotoengravingsphotofinishingsphotojournalismphotojournalistphotosynthesizephototypesetterpoliomyelitidespreconditioningprepositionallyproportionalityproportionatelyprovocativenessradioactivitiesradiotelegraphsradiotelegraphyradiotelephonesradiotherapistsrationalizationrephotographingretrospectivelyseaworthinessesservomechanismssorrowfulnessestemporarinessestrigonometricalunpronounceableunsportsmanlikeunwholesomenessacetophenetidinacknowledgeableadenocarcinomasadenoidectomiesapproachabilityastronauticallyastronavigationazidothymidinescarpometacarpuscommodificationcommonplacenessconnoisseurshipcontortionisticconvolvulaceouscosmopolitanizecyanocobalaminsdisconcertmentseconometriciansethnocentricityethnomusicologyferromagnetismsforeordinationsgeomorphologiesgluconeogenesisglyconeogenesisheliocentricityhistocompatiblehistoriographichomeopathicallyhydrocortisoneshydrodynamicisthydrometallurgyhydrostaticallyhypnotherapistsimprovisatorialincoordinationsinexorabilitieslactovegetarianmacrocosmicallymacroscopicallymalnourishmentsmastoidectomiesmetropolitanatemetropolitanismmicrocosmicallymicromillimetermicrophotographmicrosporangiummicrosporophyllmiscomprehendedneurophysiologyneuropsychiatrynitrochloroformnoncommissionednonconfidentialnonconformancesnonconventionaloligonucleotideoligosaccharideorthodonticallyorthopsychiatryosteomyelitidesosteopathicallypaleontologicalpaleopsychologypersonalizationphenolphthaleinphotochemicallyphotoconductionphotoelasticityphotoelectricalphotomechanicalphotometricallyphotomicrographphotomicroscopephotomultiplierphotosensitizedphotosensitizesphototelegraphyphototopographyphototransistorphototypographypiezoelectricalpostoperativelyprenotificationproconservationpurposelessnessradiometricallyradiomicrometerradiophotographradiotelephonicreproachfulnessreproducibilityresponsiblenessretrogressivelysaprophyticallyservomechanicalsociobiologicalsociobiologistssociolinguisticsubcontraoctavesyllogisticallytarsometatarsusuncooperativelyunknowledgeableunprofitabilityunproportionateadenohypophysesadenohypophysisaminopeptidasesanacoluthicallyanisotropicallyantiobscenitiesariboflavinosesariboflavinosisastrobiologistsastrophotographastrophysicallybenzodiazepineschemoautotrophychemoreceptionschemotacticallychemotaxonomieschemotaxonomistchemotherapistsclamorousnessescolloquialitiescompositionallycorporealnessescorrosivenessescoulometricallycustomarinessescyanocobalaminecyanoethylatingcyanoethylationcyclohexylaminecyproheptadinesdephosphorylatediagonalizationdichotomizationdichotomousnessdisconformitiesdisconsolationsdisposabilitiesdorsoventralitydyslogisticallyeconometricallyemployabilitiesepizootiologiesethnohistoriansethnohistoricaleudiometricallyeutrophicationsferromanganesesgeomorphologistglamorousnessesglucocorticoidsgluconeogenesesgnotobioticallyheliometricallyhistochemicallyhistopathologichistophysiologyhydrobiologicalhydrobiologistshydromechanicalhydroxyapatiteshydroxylapatitehydroxyprolineshypnotizabilityimprovabilitiesintrospectionalinviolatenesseslignocelluloseslignocellulosiclignosulfonatesmacroaggregatedmacroaggregatesmacroevolutionsmacrophotographmacrostructuralmacrostructuresmethoxyfluranesmicroanalyticalmicroanatomicalmicrobarographsmicrodissectionmicroearthquakemicroelectrodesmicroevolutionsmicrogametocytemicroinjectionsmicrometeoriticmicrometeoroidsmicromorphologymicrophotometermicrophotometrymicrophysicallymicroporositiesmicroprojectionmicroprojectorsmicropublishersmicropublishingmicropulsationsmicroradiographmicroseismicitymicrosporocytesmicrostructuralmicrostructuresmicrotechniquesmicrotonalitiesmiscomputationsmiscorrelationsmisvocalizationnecromanticallyneoconservatismneuroanatomicalneuroanatomistsneurobiologicalneurobiologistsneuroblastomataneurofibrillaryneurohypophysesneurohypophysisneuropathicallyneuropathologicneuropsychologyneuroscientificneuroscientistsneurosecretionsneurotoxicitiesnincompooperiesnoncoincidencesnoncombustiblesnoncompressiblenoncomputerizednonconcurrencesnonconservationnonconservativenonconsolidatednonconstructionnonconsumptionsnoncontemporarynoncontrollablenoncorrelationsnonhospitalizednontotalitarianoligodendrocyteoligodendrogliaoligomerizationopprobriousnessorthogonalitiesorthogonalizingorthophosphatesoutdoorsmanshipoveropinionatedoverorchestrateoverornamentingoxidoreductasespaleobiologicalpaleobiologistspaleoecologicalpaleoecologistspaleogeographicpaleomagnetismspaleomagnetistspaleozoologicalpaleozoologistspathogenicitiespathophysiologypentobarbitonesphenobarbitonesphenomenalisticphenomenologiesphenomenologistphonocardiogramphonogramicallyphotoautotrophsphotobiologicalphotobiologistsphotoconductivephotodegradablephotodissociatephotoduplicatedphotoduplicatesphotoelectronicphotoexcitationphotogeologicalphotogeologistsphotogrammetricphotoinductionsphotoionizationphotolithographphotooxidationsphotoperiodismsphotoproductionphotoreceptionsphotoreductionsphotosensitizerphototacticallyphototoxicitiesphototropicallyphytochemicallyphytoflagellatephytogeographerphytogeographicphytopathogenicphytoplanktonicphytotoxicitiespictorialnessesplutocraticallypreformationistpremodificationpreponderanciespreponderationspromotabilitiespromotivenessesproportionatingprosopographiesprotohistoriansprotoporphyrinsprotozoologistspurposivenessesradioautographsradioautographyradiobiologicalradiobiologistsradiochemicallyradioprotectionradioprotectiveradiostrontiumsradiotelemetricreasonabilitiesrechoreographedregionalizationretroactivitiesretrogradationsretroperitonealretroreflectionretroreflectiveretroreflectorssacrosanctitiessaprogenicitiesschlockmeistersschoolmasterishsigmoidoscopiessocioculturallysociohistoricalsteroidogenesessteroidogenesissubvocalizationthyrocalcitoninthyroidectomiestomboyishnessestrisoctahedronsturbogeneratorsunchoreographeduniformitariansunknowabilitiesunprofessionalsvideoconferenceviscoelasticityvisionarinesses

About this list

Words
446 (83 common words)
Common example
acknowledgement
Rare example
visionarinesses
Doubled letters
111
Ending in S
193
Most frequent letter
I (389)

Questions

How many 15-letter words matching ____o__________ are there?

446. 83 of them are common words.

What is a common example?

ACKNOWLEDGEMENT is among the common words in this set.