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