There are 441 fifteen-letter words containing A, C, H, I and S, https://www.bestwordlist.com/c/a/5/15letterwordswithachis.htm ACCOMPLISHMENTS ACCOUNTANTSHIPS ACHONDROPLASIAS ACHONDROPLASTIC ACHROMATICITIES ACHROMATISATION ACROPARESTHESIA ACTINOCHEMISTRY ACTINOTHERAPIES ADIATHERMANCIES AFFRANCHISEMENT ALCOHOLISATIONS ALCOHOLIZATIONS ALCOHOLOMETRIES ANAESTHETICALLY ANARCHISTICALLY ANTAPHRODISIACS ANTHROPOPHOBICS ANTHROPOPSYCHIC ANTIALCOHOLISMS ANTIAPHRODISIAC ANTIARRHYTHMICS ANTICHOLESTEROL ANTICHRISTIANLY ANTIHELMINTHICS ANTIHISTAMINICS ANTIMONARCHISTS ANTIPHLOGISTICS ANTISYPHILITICS ANTITHROMBOTICS APPRENTICEHOODS APPRENTICESHIPS ARACHNOIDITISES ARCHAEOBOTANIES ARCHAEOBOTANIST ARCHAEOMETRISTS ARCHAEZOOLOGIES ARCHEOBOTANISTS ARCHEOMAGNETISM ARCHEOZOOLOGIES ARCHEOZOOLOGIST ARCHGENETHLIACS ARCHIDIACONATES ARCHIEPISCOPACY ARCHIEPISCOPATE ARCHPRIESTHOODS ARCHPRIESTSHIPS ASTROPHYSICALLY ASTROPHYSICISTS ATHEROSCLEROSIS ATHEROSCLEROTIC ATMOSPHERICALLY AUTHENTICATIONS AUTOSCHEDIASTIC AUTOSCHEDIAZING BACCHANALIANISM BACKSCRATCHINGS BACTERIOPHAGIES BACTERIOPHAGOUS BATRACHOPHOBIAS BIBLIOTHECARIES BIOGEOCHEMICALS BRACHIOSAURUSES BRACHISTOCHRONE BRACHYCEPHALICS BRACHYCEPHALIES BRACHYCEPHALISM BRACHYDACTYLIES BRACHYDACTYLISM BRACHYDIAGONALS BRACHYPINAKOIDS BRACHYTHERAPIES BRAUNSCHWEIGERS BRONCHODILATORS BRONCHOGRAPHIES BRONCHOSCOPICAL CANTHAXANTHINES CATECHISTICALLY CATECHUMENSHIPS CATHETERISATION CATHODOGRAPHIES CATHOLICISATION CERVICOGRAPHIES CHALCOGRAPHISTS CHAMBERLAINSHIP CHANCELLORSHIPS CHANGEABILITIES CHANNELISATIONS CHANNELIZATIONS CHANNELOPATHIES CHAPTALISATIONS CHAPTALIZATIONS CHARACTERISABLE CHARACTERISTICS CHARGEABILITIES CHEMICOPHYSICAL CHEMOPSYCHIATRY CHEMOTAXONOMIES CHEMOTAXONOMIST CHEMOTHERAPISTS CHENOPODIACEOUS CHLORITISATIONS CHLORITIZATIONS CHLOROTHIAZIDES CHLORPROMAZINES CHLORPROPAMIDES CHLORTHALIDONES CHOLESTEROLEMIA CHOLESTYRAMINES CHOLINESTERASES CHONDRICHTHYANS CHONDROCRANIUMS CHORIOALLANTOIS CHRESTOMATHICAL CHROMATICNESSES CHROMATOLOGISTS CHROMOTHERAPIES CHRONOTHERAPIES CINCHONISATIONS CINCHONIZATIONS CLAUSTROPHILIAS CLAUSTROPHOBIAS CLIMATOGRAPHIES COCHAIRMANSHIPS COMMANDANTSHIPS COMMISSARYSHIPS COMPOTATIONSHIP COMPUTERPHOBIAS CONSERVATORSHIP CONSULTANTSHIPS CORINTHIANISING COUNTERSHADINGS CRASHWORTHINESS CRYPTAESTHESIAS CRYPTOGRAPHISTS CYBERCHONDRIACS CYPROHEPTADINES CYTOPATHOLOGIES CYTOPATHOLOGIST DACTYLOGRAPHIES DECHLORINATIONS DECHRISTIANISED DECHRISTIANISES DECHRISTIANIZED DECHRISTIANIZES DEPHLOGISTICATE DERMATOGLYPHICS DETACHABILITIES DIASTROPHICALLY DICHLOROETHANES DICHOTOMISATION DICHROMATICISMS DISACCHARIDASES DISENCHANTINGLY DISENCHANTMENTS DISENFRANCHISED DISENFRANCHISES DISINHERITANCES DOLICHOSAURUSES DORSIBRANCHIATE ECHINODERMATOUS ECHOCARDIOGRAMS ECTOMYCORRHIZAS ELECTROGRAPHIES ENCEPHALITOGENS ENCEPHALOTOMIES ENFRANCHISEMENT ESOPHAGOSCOPIES ETHERIFICATIONS ETHNOHISTORICAL EUPHEMISTICALLY EUTROPHICATIONS FEATHERSTITCHED FEATHERSTITCHES FETISHISTICALLY GEODEMOGRAPHICS GEOSTROPHICALLY GLOSSOGRAPHICAL GRAPHICALNESSES HALLUCINOGENICS HAMAMELIDACEOUS HARMONISTICALLY HARPSICHORDISTS HEARTSICKNESSES HEMICRYSTALLINE HEMOCHROMATOSIS HENDECASYLLABIC HEPATICOLOGISTS HERESTHETICIANS HETEROSCEDASTIC HETEROSOCIALITY HIBERNICISATION HIERACOSPHINGES HIERACOSPHINXES HISTOCHEMICALLY HISTOCOMPATIBLE HISTOPATHOLOGIC HISTORIOGRAPHIC HOLOBLASTICALLY HOLOCRYSTALLINE HOMOCHROMATISMS HOMOPLASTICALLY HOMOSOCIALITIES HUMIDIFICATIONS HYDROCORALLINES HYDRODYNAMICIST HYDROSTATICALLY HYGROSCOPICALLY HYLOZOISTICALLY HYPERACTIVITIES HYPERCALCAEMIAS HYPERCATABOLISM HYPERGLYCAEMIAS HYPERPHYSICALLY HYPERURICAEMIAS HYPERVIGILANCES HYPOCHONDRIASES HYPOCHONDRIASIS HYPOCHONDRIASMS HYPOCHONDRIASTS HYPOCRYSTALLINE HYPSOMETRICALLY ICHTHYOPHAGISTS ICHTHYOSAURIANS ICHTHYOSAURUSES ICOSITETRAHEDRA INHARMONICITIES INTERSCHOLASTIC IONOSPHERICALLY ISOTHIOCYANATES KINESTHETICALLY LEUCOCYTHAEMIAS LEXICOGRAPHISTS LICENTIATESHIPS LISSENCEPHALIES LISSENCEPHALOUS LITHOCHROMATICS MACHINABILITIES MACRENCEPHALIAS MACRENCEPHALIES MASOCHISTICALLY MATHEMATICISING MATRIARCHALISMS MECHANISTICALLY MECHANOMORPHISM MEGALOCEPHALIES MESATICEPHALIES MESATICEPHALOUS METACHROMATISMS METAMATHEMATICS METAPHYSICISING METAPHYSICIZING MICROAEROPHILES MICROBAROGRAPHS MICROPHYSICALLY MISCHARACTERISE MISCHARACTERIZE MONOCHROMATISMS MONOSACCHARIDES MORPHINOMANIACS MULTICHARACTERS MUSICOTHERAPIES MYOCARDIOGRAPHS NEUROPSYCHIATRY NONACHIEVEMENTS NONCHARISMATICS NONHISTORICALLY NONHYSTERICALLY NONPSYCHIATRIST NONPSYCHOACTIVE NONTHEISTICALLY NUDIBRANCHIATES OLIGOCYTHAEMIAS OLIGOSACCHARIDE OPHTHALMOSCOPIC ORCHESOGRAPHIES ORCHESTRATIONAL ORGANOCHLORINES ORTHOCHROMATISM ORTHOPSYCHIATRY OSCILLOGRAPHIES OSTEOARTHRITICS OSTEOPATHICALLY PACHYMENINGITIS PANTHEISTICALLY PARASYMPATHETIC PARTHENOCARPIES PATHOGENICITIES PATRIARCHALISMS PHALLOCENTRISMS PHARISAICALNESS PHARMACEUTICALS PHARMACOGNOSIES PHARMACOGNOSIST PHARMACOGNOSTIC PHARMACOLOGISTS PHARMACOPOEIANS PHARMACOPOEISTS PHARMACOPOLISTS PHARYNGOSCOPIES PHENAKISTOSCOPE PHENOMENALISTIC PHILOSOPHICALLY PHLOGISTICATING PHONEMICISATION PHONETICISATION PHOSPHOCREATINE PHOSPHOCREATINS PHOTODISSOCIATE PHOTODUPLICATES PHOTOELASTICITY PHTHALOCYANINES PHYLLOSILICATES PHYSICOCHEMICAL PHYSIOGRAPHICAL PHYSIOLOGICALLY PITHECANTHROPUS PLAGIOCEPHALIES PLAINCLOTHESMAN PLAINCLOTHESMEN POLYCHROMATISMS POLYSACCHARIDES POLYSYNTHETICAL POSTHEMORRHAGIC PREANAESTHETICS PREHISTORICALLY PROCURATORSHIPS PSEPHOLOGICALLY PSEUDEPIGRAPHIC PSYCHEDELICALLY PSYCHIATRICALLY PSYCHOACOUSTICS PSYCHOANALYSING PSYCHOANALYZING PSYCHOBIOGRAPHY PSYCHOCHEMICALS PSYCHODELICALLY PSYCHOGENETICAL PSYCHOGENICALLY PSYCHOGERIATRIC PSYCHOGRAPHICAL PSYCHOHISTORIAN PSYCHOLOGICALLY PSYCHOMETRICIAN PSYCHOSEXUALITY PSYCHOTHERAPIES PSYCHOTHERAPIST PSYCHROMETRICAL PYROTECHNICIANS RADICULOPATHIES REORCHESTRATING REORCHESTRATION RHINENCEPHALONS RHINOSCLEROMATA SACCHARIMETRIES SACCHARISATIONS SACCHARIZATIONS SACCHAROMETRIES SADOMASOCHISTIC SAPROPHYTICALLY SCAPHOCEPHALICS SCAPHOCEPHALIES SCAPHOCEPHALISM SCEUOPHYLACIUMS SCHEMATISATIONS SCHEMATIZATIONS SCHILLERISATION SCHILLERIZATION SCHISTOSOMIASES SCHISTOSOMIASIS SCHIZOAFFECTIVE SCHOLARLINESSES SCHOOLMASTERING SCHOOLMASTERISH SCHOOLTEACHINGS SCLEROTHERAPIES SCRATCHBUILDERS SCRATCHBUILDING SCRIMSHANDERING SEARCHABILITIES SEARCHINGNESSES SEISMOGRAPHICAL SELENOGRAPHICAL SEMILOGARITHMIC SERVOMECHANICAL SERVOMECHANISMS SHOCKUMENTARIES SKETCHABILITIES SOCIOHISTORICAL SOPHISTICATEDLY SOPHISTICATIONS SPECTROGRAPHIES SPEECHIFICATION SPHERICALNESSES SPINTHARISCOPES SPIROCHAETAEMIA SPLANCHNOLOGIES STAPHYLOPLASTIC STEEPLECHASINGS STEGOCEPHALIANS STEREOGRAPHICAL STOECHIOLOGICAL STOICHIOLOGICAL STRAIGHTJACKETS STRATIGRAPHICAL STRATOSPHERICAL SULPHACETAMIDES SUPERCARGOSHIPS SYCOPHANTICALLY SYMPATHECTOMIES SYMPATHETICALLY SYMPATHOMIMETIC SYNCHRONISATION SYNCHRONISTICAL SYNCHRONIZATION SYNECDOCHICALLY TECHNICALNESSES THALASSOCRACIES THALASSOGRAPHIC THALATTOCRACIES THEATRICALISING THEATRICALITIES THEOSOPHISTICAL THICKHEADEDNESS THORACOCENTESIS THORACOPLASTIES TRANSHISTORICAL TRICHINISATIONS TRICHINIZATIONS TRICHOMONACIDES TRISOCTAHEDRONS UNCHRISTIANISED UNCHRISTIANISES UNCHRISTIANIZED UNCHRISTIANIZES UNCHRISTIANLIKE UNPHILOSOPHICAL UNSOPHISTICATED WAPPENSCHAWINGS WHIMSICALNESSES ZYGOBRANCHIATES