There are 568 thirteen-letter words containing A, C, H, O and S, https://www.bestwordlist.com/c/a/5/13letterwordswithachos.htm ACCOMPLISHERS ACCOMPLISHING ACCOUCHEMENTS ACHLORHYDRIAS ACHROMATISING ACHROMATOPSIA ACIDOPHILUSES ADIAPHORISTIC ADRENOCHROMES AEROMECHANICS AETHRIOSCOPES AGROCHEMICALS AHISTORICALLY AHISTORICISMS AICHMOPHOBIAS ALLOCHTHONOUS AMPHICTYONIES AMPHISTOMATIC AMPHITRICHOUS ANACHRONISTIC ANACHRONOUSLY ANAPHRODISIAC ANCHORPERSONS ANGLOPHOBIACS ANTIPSYCHOTIC APHRODISIACAL APOCHROMATISM ARACHNOIDITIS ARACHNOLOGIES ARACHNOLOGIST ARACHNOPHOBES ARCHAEOLOGIES ARCHAEOLOGIST ARCHAEORNISES ARCHBISHOPRIC ARCHEGONIATES ARCHEOLOGISTS ARCHEOMETRIES ARCHIPELAGOES ARCHIPHONEMES ARCHOSAURIANS ARCTOPHILISTS ARISTOLOCHIAS ARTHRECTOMIES ARTHROSCOPIES ASSOCIATESHIP ASTROPHYSICAL ASYNCHRONISMS ATMOSPHERICAL AUTOCEPHALIES AUTOCEPHALOUS AUTOCHTHONIES AUTOCHTHONISM AUTOCHTHONOUS AUTORICKSHAWS AUTOSCHEDIASM AUTOSCHEDIAZE BACHELORETTES BACHELORHOODS BACHELORSHIPS BEACHCOMBINGS BEHAVIORISTIC BIOPHYSICALLY BODYSNATCHERS BRACHIOSAURUS BRACHYPTEROUS BREECHLOADERS BRONCHOSPASMS CACHINNATIONS CACOPHONOUSLY CAMPHORACEOUS CANCERPHOBIAS CANDLEHOLDERS CAPNOGRAPHIES CARBOHYDRASES CARBOHYDRATES CARDIOPATHIES CARTOGRAPHERS CARTOGRAPHIES CARTOPHILISTS CATASTROPHISM CATASTROPHIST CATECHISATION CATHETOMETERS CATHIODERMIES CATHODOGRAPHS CATHOLICISING CATHOLICITIES CEPHALISATION CEPHALOMETERS CEPHALOPODANS CEPHALOPODOUS CEPHALOSPORIN CEPHALOTOMIES CERAUNOGRAPHS CEROGRAPHISTS CHAENOMELESES CHALAZOGAMIES CHALCEDONYXES CHALCOGENIDES CHALCOPYRITES CHALICOTHERES CHAMPIONESSES CHAMPIONSHIPS CHANCELLORIES CHANGEAROUNDS CHAPTERHOUSES CHARLESTONING CHECKERBOARDS CHEIROMANCERS CHEIROMANCIES CHELUVIATIONS CHEMOAUTROPHS CHEMOSURGICAL CHEQUERBOARDS CHIAROSCURISM CHIAROSCURIST CHILIAHEDRONS CHIMNEYBOARDS CHIROGRAPHERS CHIROGRAPHIES CHIROGRAPHIST CHIROPRACTICS CHIROPRACTORS CHLAMYDOMONAS CHLAMYDOSPORE CHLORAMBUCILS CHLORENCHYMAS CHLORINATIONS CHLOROPLASTAL CHLOROPLASTIC CHOLESTERATES CHONDRIOSOMAL CHONDROBLASTS CHONDROMATOUS CHONDROSAMINE CHONDROSTIANS CHOREGRAPHERS CHOREGRAPHIES CHOREPISCOPAL CHOROGRAPHERS CHOROGRAPHIES CHORUSMASTERS CHRESTOMATHIC CHRISMATORIES CHROMATICISMS CHROMATICNESS CHROMATOGRAMS CHROMATOLYSES CHROMATOLYSIS CHROMATOPSIAS CHROMOSOMALLY CHRYSOCRACIES CINCHONACEOUS CLAUSTROPHOBE CLAVICHORDIST CLEARINGHOUSE COACHBUILDERS COADJUTORSHIP COAUTHORSHIPS COCHAIRPERSON COENAESTHESES COENAESTHESIA COENAESTHESIS COENESTHESIAS COHABITATIONS COLLEAGUESHIP COLLIESHANGIE COLOURWASHING COMMANDERSHIP COMMONWEALTHS COMPANIONSHIP CONSTABLESHIP CONTAINERSHIP COPARTNERSHIP COPROPHAGISTS COPROPHILIACS CORESEARCHERS CORINTHIANISE CORPORALSHIPS CORRIVALSHIPS COSMOCHEMICAL COSMOGRAPHERS COSMOGRAPHIES COSMOGRAPHIST COSMOTHETICAL COUNTERCHARMS COUNTERSHAFTS CRASHWORTHIER CREATUREHOODS CRITHOMANCIES CROSSHATCHING CROSSMATCHING CRYOTHERAPIES CUSTODIANSHIP CYCLOTHYMIACS CYSTOGRAPHIES CYTOCHALASINS DECHLORINATES DIACHRONISTIC DICHLAMYDEOUS DICHROMATISMS DICTATORSHIPS DIENCEPHALONS DISCOGRAPHERS DISCOGRAPHIES DODECAHEDRONS DODECAPHONIES DODECAPHONISM DODECAPHONIST DOLICHOSAURUS DOOMWATCHINGS ECHOLOCATIONS ELASMOBRANCHS ELECTROGRAPHS ENCROACHMENTS EPENCEPHALONS ESCHATOLOGIES ESCHATOLOGIST ESCHSCHOLTZIA ESCHSCHOLZIAS ESOPHAGOSCOPE ESOPHAGOSCOPY ETHEROMANIACS FLOWCHARTINGS FRANCOPHOBIAS GALACTORRHEAS GENETHLIACONS GEOPHYSICALLY HAEMODYNAMICS HAEMOPHILIACS HALLUCINATORS HALLUCINOGENS HARMONICHORDS HARUSPICATION HECTOGRAPHIES HEMATOBLASTIC HEMICHORDATES HENCEFORWARDS HEPATECTOMIES HEPATOSCOPIES HETEROBLASTIC HETEROCARPOUS HETERODACTYLS HETEROPLASTIC HETEROTACTOUS HEXACHLORIDES HEXADACTYLOUS HIERACOSPHINX HIPPOCENTAURS HIPPOCREPIANS HISTOCHEMICAL HOCHMAGANDIES HOLOPARASITIC HOMOSCEDASTIC HOMOSOCIALITY HOUSECLEANING HUMIFICATIONS HYDNOCARPATES HYDROCEPHALUS HYDROCRACKERS HYDRODYNAMICS HYDROSCOPICAL HYDROSTATICAL HYDROTHORACES HYGROSCOPICAL HYPERCAUTIOUS HYPERREACTORS HYPERSARCOMAS HYPERSARCOSES HYPERSARCOSIS HYPOACIDITIES HYPOCALCEMIAS HYPOCHONDRIAS HYPOGLYCEMIAS HYPOTHECATORS HYPSOMETRICAL IATROCHEMISTS ICHNOGRAPHIES ICHTHYOCOLLAS ICHTHYOFAUNAS ICHTHYOPSIDAN ICHTHYOSAURUS ICONOGRAPHERS ICONOGRAPHIES ICONOMACHISTS INDOMETHACINS ISOCHEIMENALS KURCHATOVIUMS LACHRYMATIONS LAUGHINGSTOCK LEPTOCEPHALUS LYCANTHROPIES LYCANTHROPIST LYMPHOBLASTIC LYMPHOSARCOMA MACHAIRODONTS MACHTPOLITIKS MALACOPHILIES MALACOPHILOUS MARCHIONESSES MARCONIGRAPHS MARSIPOBRANCH MASTIGOPHORIC MECHANISATION MEGACEPHALOUS MELANCHOLIACS MELANCHOLIOUS MELANOCHROOUS MESENCEPHALON MESOCEPHALICS MESOCEPHALIES MESOCEPHALISM MESOCEPHALOUS METACHRONISMS MICROGRAPHERS MICROGRAPHICS MICROGRAPHIES MICROHABITATS MICROMACHINES MICROPHYSICAL MONEYCHANGERS MONOCHROMATES MUSICOTHERAPY MYCETOPHAGOUS MYTHICISATION NARCOHYPNOSES NARCOHYPNOSIS NECROGRAPHERS NECROPHILIACS NEOSCHOLASTIC NONAESTHETICS NONALCOHOLICS NONARCHITECTS NONCHARACTERS NONCHAUVINIST NONHISTORICAL NONHYSTERICAL NONPHYSICIANS NYMPHAEACEOUS NYMPHOMANIACS OCHLOPHOBIACS ONYCHOMANCIES ONYCHOPHAGIES ONYCHOPHAGIST ONYCHOPHORANS OPISTHOBRANCH ORCHESOGRAPHY ORCHESTRALIST ORCHESTRATERS ORCHESTRATING ORCHESTRATION ORCHESTRATORS ORCHIDOMANIAS ORNITHISCHIAN ORTHOSILICATE OSCILLOGRAPHS OSCILLOGRAPHY OSTEICHTHYANS OVERACHIEVERS OVERCHARGINGS OYSTERCATCHER PACKINGHOUSES PAEDOPHILIACS PANCHROMATISM PANPHARMACONS PANSOPHICALLY PANTECHNICONS PARACHRONISMS PARAPSYCHOSES PARAPSYCHOSIS PAROCHIALISED PAROCHIALISES PAROCHIALISMS PAROCHIALIZES PENTASTICHOUS PETROPHYSICAL PHAGOCYTISING PHAGOCYTOSING PHARMACOGNOSY PHARMACOPEIAS PHARYNGOSCOPE PHARYNGOSCOPY PHELLOPLASTIC PHILHARMONICS PHILOSOPHICAL PHLEGMAGOGICS PHLOGISTICATE PHONOCAMPTICS PHOTOCATHODES PHOTODYNAMICS PHOTOMACHINES PHOTOSCANNING PHOTOVOLTAICS PHYCOXANTHINS PHYSHARMONICA PHYSIOCRACIES PHYSIOGRAPHIC PHYSIOLOGICAL PICTOGRAPHIES POLYCYTHEMIAS POSTHOLOCAUST POTICHOMANIAS PREHISTORICAL PROCATHEDRALS PROMONARCHIST PROPHYLACTICS PROSENCEPHALA PROSENCHYMATA PSEPHOLOGICAL PSILANTHROPIC PSYCHOANALYSE PSYCHOANALYST PSYCHOANALYZE PSYCHOBABBLED PSYCHOBABBLER PSYCHOBABBLES PSYCHODYNAMIC PSYCHOGRAPHIC PSYCHOLOGICAL PSYCHOMACHIAS PSYCHOMACHIES PSYCHOPATHICS PSYCHOPATHIES PSYCHOPATHIST PSYCHOSOMATIC PSYCHOTHERAPY PSYCHOTICALLY PTOCHOCRACIES PYROCATECHINS PYROCATECHOLS QUADRAPHONICS QUADRIPHONICS QUADROPHONICS RADIOCHEMISTS REORCHESTRATE REPROGRAPHICS RETROPHILIACS RHABDOMANCERS RHABDOMANCIES RHAPSODICALLY RHINOSCLEROMA RHOPALOCEROUS SACCHAROMETER SACCHAROMETRY SACCHAROMYCES SADOMASOCHISM SADOMASOCHIST SANSCULOTTISH SARCOPHAGUSES SCALENOHEDRON SCAPHOCEPHALI SCAPHOCEPHALY SCARAMOUCHING SCENOGRAPHERS SCENOGRAPHIES SCEUOPHYLACIA SCEUOPHYLAXES SCHIZAEACEOUS SCHIZOCARPOUS SCHIZOPHRENIA SCHIZOTHYMIAS SCHOLARLINESS SCHOLASTICATE SCHOLASTICISM SCHOOLMARMISH SCHOOLMASTERS SCHOOLTEACHER SCLEROTHERAPY SCOPOPHILIACS SCOPTOPHILIAS SCOPTOPHOBIAS SCRATCHBOARDS SCROPHULARIAS SEISMOGRAPHIC SELENOGRAPHIC SEMIOCHEMICAL SHADOWCASTING SHAMBOLICALLY SHARECROPPERS SHARECROPPING SHOCKUMENTARY SHORTCHANGERS SHORTCHANGING SOMATOTROPHIC SOPHISTICALLY SOPHISTICATED SOPHISTICATES SOPHISTICATOR SPATCHCOCKING SPECTATORSHIP SPECTROGRAPHS SPECTROGRAPHY SPERMATOTHECA SPHACELATIONS SPHAGNICOLOUS SPLANCHNOCELE SPLANCHNOLOGY STAGECOACHING STAGECOACHMAN STAGECOACHMEN STAPHYLOCOCCI STEREOGRAPHIC STICHOMYTHIAS STRATOSPHERIC SUBARACHNOIDS SUBDEACONSHIP SYCOPHANTICAL SYCOPHANTISED SYCOPHANTISES SYCOPHANTISMS SYCOPHANTIZED SYCOPHANTIZES SYCOPHANTLIER SYCOPHANTRIES SYMPATHECTOMY SYMPATHOLYTIC SYMPHONICALLY SYNECDOCHICAL TACHEOMETRIES TACHISTOSCOPE TAUTOCHRONISM TAUTOCHRONOUS TECHNOBABBLES TECHNOCRACIES TECHNOMANIACS TECHNOPHILIAS TECHNOPHOBIAS TEPHROMANCIES TERPSICHOREAL TERPSICHOREAN TETRASTICHOUS THALASSOCRACY THALASSOCRATS THEORETICIANS THERMOPLASTIC THERMOSTATICS THORACENTESES THORACENTESIS THORACOPLASTY THORACOSCOPES THORACOTOMIES THRASONICALLY THROATLATCHES TOUCHABLENESS TOXICOPHAGOUS TOXICOPHOBIAS TRACHEOPHYTES TRACHEOTOMIES TRANSTHORACIC TREACHEROUSLY TRICHOMONASES TRICHOPTERANS TRICHROMATISM TRISOCTAHEDRA TROCHEAMETERS TROPHOBLASTIC TURBOCHARGERS UNSCHOLARLIKE VOUCHSAFEMENT WATCHDOGGINGS WEATHERCLOTHS XANTHOCHROIAS XANTHOCHROIDS XANTHOCHROISM XANTHOCHROOUS ZINCOGRAPHERS ZINCOGRAPHIES