There are 460 twelve-letter words containing A, H, O and 2S, https://www.bestwordlist.com/c/a/5/12letterwordswithahoss.htm ABOLISHMENTS ACCOMPLISHES ACCOUCHEUSES ACHROMATISES ACHROMATISMS ACOLOUTHOSES ADIAPHORISMS ADIAPHORISTS AESTHESIOGEN AHISTORICISM AKOLOUTHOSES ALLOPATHISTS AMPHISTOMOUS ANACHRONISMS ANAMORPHISMS ANAMORPHOSES ANAMORPHOSIS ANORTHOSITES ANOTHERGUESS ANSWERPHONES ANTHOLOGISES ANTHOLOGISTS ANTHRACNOSES ANTIFASHIONS ANTISTROPHES APHRODISIACS APOSTLESHIPS APOSTROPHISE APOTHEOSISED APOTHEOSISES APOTHEOSIZES ARCHDIOCESES ARTHROSCOPES ARTHROSPORES ASPHYXIATORS ASSESSORSHIP ASTONISHMENT ASTRAPHOBIAS ASTROHATCHES ASTROPHOBIAS ASTROPHYSICS ASTROSPHERES ASYNCHRONIES ASYNCHRONISM ASYNCHRONOUS ATHROCYTOSES ATHROCYTOSIS ATMOSPHERICS AUDITORSHIPS AUTOHYPNOSES AUTOHYPNOSIS BACHELORISMS BAROPHORESES BAROPHORESIS BARRELHOUSES BASHIBAZOUKS BEHAVIORISMS BEHAVIORISTS BILHARZIOSES BILHARZIOSIS BIOGRAPHISES BLASTOCHYLES BLASTOSPHERE BODHISATTVAS BOHEMIANISMS BONDMANSHIPS BRACHIOSAURS BRONCHOSPASM CANEPHORUSES CANOPHILISTS CASHMOBBINGS CATAPHORESES CATAPHORESIS CATASTROPHES CATHOLICISES CATHOLICISMS CATHOLICOSES CHAIRPERSONS CHANSONETTES CHANSONNIERS CHASMOGAMIES CHASMOGAMOUS CHEESEBOARDS CHEMONASTIES CHEMOTAXISES CHIAROSCUROS CHIASTOLITES CHLOROPLASTS CHOIRMASTERS CHORIAMBUSES CHORISATIONS CHORUSMASTER CHRISMATIONS CHROMOPLASTS CHRYSAROBINS CHRYSOCOLLAS CHRYSOPRASES COENESTHESIA COLOURWASHES COMRADESHIPS CORIVALSHIPS CORNSTARCHES CRAPSHOOTERS CREATORSHIPS CRESCOGRAPHS CROSSHATCHED CROSSHATCHES CROSSMATCHED CROSSMATCHES CROSSPATCHES CURATORSHIPS DASYPHYLLOUS DIACHRONISMS DIASTROPHISM DIPHOSPHATES DISAUTHORISE DISCOPHORANS DISHARMONIES DISHARMONISE DOLLARFISHES DRAGONFISHES EAVESTROUGHS ENHYPOSTASIA EPANORTHOSES EPANORTHOSIS ERYTHROPSIAS ESCARMOUCHES ESCHSCHOLZIA ESTRANGHELOS FASHIONABLES FASHIONISTAS FASHIOUSNESS FATHOMLESSLY FELDSPATHOSE FELSPATHOIDS FOOLHARDISES FOREMANSHIPS GASTROSOPHER GASTROTRICHS GLOSSOGRAPHY GNATHOSTOMES GRASSHOPPERS GROATSWORTHS GROUNDSHARES HAEMATOLYSES HAEMATOLYSIS HAEMOPOIESES HAEMOPOIESIS HAEMOSTASIAS HAEMOSTATICS HAGIOLOGISTS HALLOWEDNESS HALLUCINOSES HALLUCINOSIS HALOPHYTISMS HAMMERSTONES HANDSOMENESS HANDYPERSONS HARBOURSIDES HARMONICISTS HARPSICHORDS HEARTHSTONES HEMATOBLASTS HEMIANOPSIAS HEMODIALYSES HEMODIALYSIS HEROICALNESS HETEROSCIANS HETEROUSIANS HEXASTICHONS HIPPODAMISTS HISPANIOLISE HOARSENESSES HOLLANDAISES HOMESTEADERS HOMOBLASTIES HOMOEOSTASES HOMOEOSTASIS HOMOIOUSIANS HOMOPLASMIES HOMOPLASTIES HOOLIGANISMS HORSEMANSHIP HORSEPLAYERS HORSERACINGS HOSPITALISED HOSPITALISES HOSPITALISTS HOSPITALIZES HOSPITALLERS HOUSEBOATERS HOUSEFATHERS HOUSEHUSBAND HOUSEMASTERS HOUSEPARENTS HYDROGENASES HYDROLYSATES HYDROMASSAGE HYDROMEDUSAS HYDROSTATICS HYDROXYLASES HYGROCHASIES HYLOPATHISMS HYLOPATHISTS HYOSCYAMINES HYOSCYAMUSES HYPERSOMNIAS HYPOCORISMAS HYPOGLOSSALS HYPOPLASTIES HYPOSTASISED HYPOSTASISES HYPOSTASIZED HYPOSTASIZES HYPOSTATISED HYPOSTATISES HYPOSTATIZES HYPOSTHENIAS HYPSOPHOBIAS ICHTHYOSAURS ICOSAHEDRONS INCHOATENESS ISODIAPHERES ISOSTHENURIA JANITORSHIPS JEALOUSHOODS JOHNSONGRASS KALASHNIKOVS KWASHIORKORS LEASEHOLDERS LOATHFULNESS LOGOMACHISTS LYMPHOBLASTS MACKINTOSHES MACROPHYSICS MARSHLOCKSES MARSHMALLOWS MASSOTHERAPY MESOGNATHIES MESOGNATHISM MESOGNATHOUS MESOTHORACES MESOTHORAXES METAPHORISTS MISANTHROPES MISANTHROPOS MISBEHAVIORS MYCOPHAGISTS MYOGRAPHISTS NONHOSPITALS NONPHYSICALS NORTHEASTERS NOSOGRAPHERS NOSOGRAPHIES NOSTOPATHIES NOTAPHILISMS NOTAPHILISTS OAFISHNESSES OARSMANSHIPS OCTASTICHONS OCTASTICHOUS OESOPHAGITIS OESOPHAGUSES OMNISHAMBLES OPHTHALMISTS ORCHARDGRASS ORCHESTRATES ORCHESTRINAS ORNITHOSAURS OSTEOPATHIES OSTEOPATHIST OSTREOPHAGES OVEREMPHASES OVEREMPHASIS OVERHARVESTS OVERLAVISHES OVERRASHNESS PARAPHIMOSES PARAPHIMOSIS PARAPOPHYSES PARAPOPHYSIS PARASTICHOUS PARISHIONERS PARROTFISHES PATHOGENESES PATHOGENESIS PATHOLOGISES PATHOLOGISTS PATROONSHIPS PHAGOCYTISES PHAGOCYTISMS PHAGOCYTOSES PHAGOCYTOSIS PHALAENOPSES PHALAENOPSIS PHOSPHATASES PHOSPHATIDES PHOSPHATISED PHOSPHATISES PHOSPHATIZES PHOSPHORATES PHOTOFLASHES PHOTOMOSAICS PHOTONASTIES PHRASEOGRAMS PHYSIOLATERS PHYTOPLASMAS PLOUGHSHARES PLOUGHSTAFFS PLOWMANSHIPS POACHINESSES POLYANTHUSES POSTHOSPITAL PRAETORSHIPS PROGNATHISMS PROSENCHYMAS PROSOBRANCHS PROTHALLUSES PSAMMOPHILES PSAMMOPHYTES PSEUDOGRAPHS PSYCHAGOGUES PSYCHODELIAS PSYCHODRAMAS PSYCHOGRAPHS PSYCHOSEXUAL PSYCHOSOCIAL QUAESTORSHIP REAUTHORISES REPROACHLESS RHAPSODISING RHAPSODISTIC ROUGHCASTERS SADDLECLOTHS SAPROPHAGOUS SAPROPHYTISM SARCOPHAGOUS SARRUSOPHONE SAXOPHONISTS SCARAMOUCHES SCATOPHAGIES SCATOPHAGOUS SCHECKLATONS SCHISTOSOMAL SCHOLARLIEST SCHOLARSHIPS SCHOLASTICAL SCHOOLCRAFTS SCHOOLMASTER SCHORLACEOUS SCOPOPHILIAS SCOPOPHOBIAS SCYPHISTOMAE SCYPHISTOMAS SEAWORTHIEST SEISMOGRAPHS SEISMOGRAPHY SELENOGRAPHS SENATORSHIPS SERVANTHOODS SHACKLEBONES SHADOWCASTED SHADOWGRAPHS SHAREHOLDERS SHARPSHOOTER SHOALINESSES SHOOTAROUNDS SHOPAHOLISMS SHOPBREAKERS SHORTCHANGES SHORTGRASSES SHOVELBOARDS SHOWMANLIEST SHOWMANSHIPS SIALORRHOEAS SINANTHROPUS SITIOPHOBIAS SLAUGHTEROUS SLAVEHOLDERS SMALLCLOTHES SMALLHOLDERS SNAPSHOOTERS SNAPSHOOTING SNAPSHOTTING SOCIOPATHIES SOMAESTHESIA SOMAESTHESIS SOMAESTHETIC SOMESTHESIAS SONOGRAPHERS SONOGRAPHIES SOOTHSAYINGS SOPHISTICATE SOUSAPHONIST SOUTHEASTERN SOUTHEASTERS SOUTHLANDERS SPARROWHAWKS SPELAEOTHEMS SPHEROPLASTS SPHYGMOGRAMS SPIROCHAETES SPLASHBOARDS STADTHOLDERS STAGECOACHES STAKEHOLDERS STAKHANOVISM STALLHOLDERS STEATORRHEAS STENOPHAGOUS STEREOGRAPHS STOMACHACHES STONEBRASHES STONEWASHING STRATOSPHERE STROPHANTHUS SUBHARMONICS SUBHASTATION SULPHURATORS SWITCHBOARDS SYCOPHANCIES SYCOPHANTISE SYCOPHANTISH SYCOPHANTISM SYMPOSIARCHS SYNANTHEROUS SYNARTHROSES SYNARTHROSIS SYNCHROFLASH TAPHONOMISTS TECHNOSPEAKS THALASSOCRAT THEOMACHISTS THIOSULFATES THOROUGHBASS THOUGHTCASTS THROATLASHES TORSIOGRAPHS TRAITORSHIPS TRANSPHOBIAS TRAPSHOOTERS TROPHOBLASTS TROPHOPLASMS UROLITHIASES UROLITHIASIS VAIVODESHIPS VAPORISHNESS VOUCHSAFINGS WAREHOUSINGS WHISKERANDOS WHOLESALINGS WHOREMASTERS WOMANISHNESS WORDSEARCHES WORKAHOLISMS WORKMANSHIPS XIPHOPAGUSES ZOOGRAPHISTS ZYGAPOPHYSES ZYGAPOPHYSIS