There are 610 fifteen-letter words containing A, E, H, I and S, https://www.bestwordlist.com/c/a/5/15letterwordswithaehis.htm
ACCOMPLISHMENTS ACHROMATICITIES ACROPARESTHESIA ACTINOCHEMISTRY
ACTINOTHERAPIES ADENOHYPOPHYSIS ADIATHERMANCIES AEROLITHOLOGIES
AFFRANCHISEMENT AIRWORTHINESSES ALCOHOLOMETRIES ALEXIPHARMAKONS
ALLELOMORPHISMS ALPHABETISATION ALUMINOTHERMIES AMINOPHENAZONES
AMPHIDIPLOIDIES ANAESTHESIOLOGY ANAESTHETICALLY ANESTHETISATION
ANESTHETIZATION ANTHROPOGENESIS ANTHROPOLATRIES ANTHROPOMETRIES
ANTHROPOMETRIST ANTHROPOPATHIES ANTHROPOPHAGIES ANTHROPOSOPHIES
ANTICHOLESTEROL ANTIDIARRHOEALS ANTIFASHIONABLE ANTIHELMINTHICS
APHELIOTROPISMS APOPHTHEGMATISE APOPHTHEGMATIST APOTHEGMATISING
APPRENTICEHOODS APPRENTICESHIPS ARACHNOIDITISES ARCHAEOBOTANIES
ARCHAEOBOTANIST ARCHAEOMETRISTS ARCHAEZOOLOGIES ARCHEOBOTANISTS
ARCHEOMAGNETISM ARCHEOZOOLOGIES ARCHEOZOOLOGIST ARCHGENETHLIACS
ARCHIDIACONATES ARCHIEPISCOPACY ARCHIEPISCOPATE ARCHPRIESTHOODS
ARCHPRIESTSHIPS AROMATHERAPISTS ARTERIOGRAPHIES ATHEROSCLEROSIS
ATHEROSCLEROTIC ATMOSPHERICALLY AUTHENTICATIONS AUTOBIOGRAPHERS
AUTOBIOGRAPHIES AUTOSCHEDIASTIC AUTOSCHEDIAZING AZIDOTHYMIDINES
BACTERIOPHAGIES BACTERIOPHAGOUS BALNEOTHERAPIES BIBLIOTHECARIES
BIBLIOTHERAPIES BIGHEADEDNESSES BIOGEOCHEMICALS BISPHOSPHONATES
BLAMEWORTHINESS BRACHIOSAURUSES BRACHISTOCHRONE BRACHYCEPHALICS
BRACHYCEPHALIES BRACHYCEPHALISM BRACHYDACTYLIES BRACHYTHERAPIES
BRAUNSCHWEIGERS BREATHABILITIES BREATHARIANISMS BRONCHOGRAPHIES
CANTHAXANTHINES CATECHISTICALLY CATECHUMENSHIPS CATHETERISATION
CATHODOGRAPHIES CERVICOGRAPHIES CHAMBERLAINSHIP CHANCELLORSHIPS
CHANGEABILITIES CHANNELISATIONS CHANNELIZATIONS CHANNELOPATHIES
CHARACTERISABLE CHARACTERISTICS CHARGEABILITIES CHEMICOPHYSICAL
CHEMOPSYCHIATRY CHEMOTAXONOMIES CHEMOTAXONOMIST CHEMOTHERAPISTS
CHENOPODIACEOUS CHLOROTHIAZIDES CHLORPROMAZINES CHLORPROPAMIDES
CHLORTHALIDONES CHOLESTEROLEMIA CHOLESTYRAMINES CHOLINESTERASES
CHRESTOMATHICAL CHROMATICNESSES CHROMOTHERAPIES CHRONOTHERAPIES
CLIMATOGRAPHIES COMPUTERPHOBIAS CONSERVATORSHIP COUNTERSHADINGS
CRASHWORTHINESS CRYPTAESTHESIAS CYBERCHONDRIACS CYPROHEPTADINES
CYTOPATHOLOGIES DACTYLOGRAPHIES DECHLORINATIONS DECHRISTIANISED
DECHRISTIANISES DECHRISTIANIZED DECHRISTIANIZES DEHUMANISATIONS
DEHUMANIZATIONS DEHYPNOTISATION DEPHLOGISTICATE DERMATOGLYPHICS
DERMATOGRAPHIAS DERMATOGRAPHIES DERMATOPHYTOSIS DESULPHURATIONS
DETACHABILITIES DEXAMPHETAMINES DIAHELIOTROPISM DIAPHOTOTROPIES
DIAPHRAGMITISES DICHLOROETHANES DIMENHYDRINATES DISACCHARIDASES
DISENCHANTINGLY DISENCHANTMENTS DISENFRANCHISED DISENFRANCHISES
DISENTHRALLMENT DISENTHRALMENTS DISESTABLISHING DISHEARTENINGLY
DISHEARTENMENTS DISINHERITANCES DISTINGUISHABLE DOLICHOSAURUSES
DORSIBRANCHIATE EARTHSHATTERING ECHINODERMATOUS ECHOCARDIOGRAMS
ECTOMYCORRHIZAS EDRIOPHTHALMOUS ELECTROGRAPHIES ELEUTHEROMANIAS
ENANTIOMORPHIES ENANTIOMORPHISM ENANTIOMORPHOUS ENCEPHALITOGENS
ENCEPHALOTOMIES ENFRANCHISEMENT ENHYPOSTATISING ENHYPOSTATIZING
ENTEROHEPATITIS ENTHRONISATIONS ENTHRONIZATIONS EPITHELIALISING
EPITHELIOMATOUS EPITHELISATIONS EPITHELIZATIONS ESOPHAGOSCOPIES
ETHEREALISATION ETHERIFICATIONS ETHNOHISTORIANS ETHNOHISTORICAL
EUPHEMISTICALLY EUTROPHICATIONS FAITHLESSNESSES FAITHWORTHINESS
FASHIONABLENESS FEATHERBEDDINGS FEATHERSTITCHED FEATHERSTITCHES
FETISHISTICALLY FOOLHARDINESSES GENETHLIALOGIES GEODEMOGRAPHICS
GEOSTROPHICALLY GRAPHICALNESSES HABITABLENESSES HAEMAGGLUTININS
HALLUCINOGENICS HAMAMELIDACEOUS HEADMASTERLIEST HEADMASTERSHIPS
HEADMISTRESSIER HEARTSICKNESSES HEMAGGLUTINATES HEMICRYSTALLINE
HEMOCHROMATOSIS HEMOGLOBINURIAS HENDECASYLLABIC HEPARINISATIONS
HEPARINIZATIONS HEPATICOLOGISTS HEREDITARIANISM HEREDITARIANIST
HERESIOGRAPHERS HERESIOGRAPHIES HERESTHETICIANS HERMAPHRODITISM
HERNIORRHAPHIES HETEROSCEDASTIC HETEROSEXUALITY HETEROSOCIALITY
HETEROTHALLISMS HEXOSAMINIDASES HIBERNICISATION HIERACOSPHINGES
HIERACOSPHINXES HIEROGRAMMATIST HILARIOUSNESSES HISTOCHEMICALLY
HISTOCOMPATIBLE HISTORIOGRAPHER HOLOCRYSTALLINE HOLOMETABOLISMS
HOMOGENISATIONS HOMOGENIZATIONS HOMOSEXUALITIES HOMOSOCIALITIES
HONOURABILITIES HORIZONTALITIES HYDROCORALLINES HYDROGENISATION
HYDROTHERAPISTS HYDROXYAPATITES HYPERACTIVITIES HYPERADRENALISM
HYPERAESTHESIAS HYPERAGGRESSIVE HYPERCALCAEMIAS HYPERCATABOLISM
HYPERFASTIDIOUS HYPERGLYCAEMIAS HYPERINFLATIONS HYPERLIPIDEMIAS
HYPERMETABOLISM HYPERNATRAEMIAS HYPERPARASITISM HYPERPHYSICALLY
HYPERPOLARISING HYPERSALINITIES HYPERSALIVATION HYPERSTIMULATED
HYPERSTIMULATES HYPERURICAEMIAS HYPERVENTILATES HYPERVIGILANCES
HYPNOTHERAPISTS HYPOCHONDRIASES HYPOCRYSTALLINE HYPOMAGNESAEMIA
HYPOMAGNESEMIAS HYPSOMETRICALLY ICHTHYOSAURUSES ICOSITETRAHEDRA
IMMUNOTHERAPIES IMPERISHABILITY INAPPREHENSIBLE INAPPREHENSIONS
INHARMONICITIES INHERITABLENESS INHOSPITALITIES INTERBEHAVIOURS
INTERSCHOLASTIC IONOSPHERICALLY ISOTHIOCYANATES KINDHEARTEDNESS
KINESITHERAPIES KINESTHETICALLY LABYRINTHITISES LEGISLATORSHIPS
LEUCOCYTHAEMIAS LEXICOGRAPHISTS LICENTIATESHIPS LIEUTENANTSHIPS
LIGHTFASTNESSES LIONHEARTEDNESS LISSENCEPHALIES LISSENCEPHALOUS
LYMPHADENITISES MACHINABILITIES MACRENCEPHALIAS MACRENCEPHALIES
MAGISTRATESHIPS MARSHMALLOWIEST MASSOTHERAPISTS MATHEMATICISING
MATHEMATISATION MECHANISTICALLY MECHANOMORPHISM MEGALOCEPHALIES
MESATICEPHALIES MESATICEPHALOUS METABISULPHITES METACHROMATISMS
METALLOGRAPHIES METALLOGRAPHIST METAMATHEMATICS METAPHYSICISING
METAPHYSICIZING METHAEMOGLOBINS METHYLXANTHINES MICROAEROPHILES
MISAPPREHENDING MISAPPREHENSION MISAPPREHENSIVE MISCHARACTERISE
MISCHARACTERIZE MISSHAPENNESSES MONOSACCHARIDES MULTICHARACTERS
MULTITHREADINGS MUSICOTHERAPIES NEARSIGHTEDNESS NEOARSPHENAMINE
NEUROPSYCHIATRY NIGHTMARISHNESS NONACHIEVEMENTS NONHOSPITALISED
NONHOSPITALIZED NONHYSTERICALLY NONPSYCHOACTIVE NONTHEISTICALLY
NORTHEASTERLIES NUDIBRANCHIATES OLIGOCYTHAEMIAS OLIGOSACCHARIDE
OPHTHALMOLOGIES OPISTHOGRAPHIES ORCHESOGRAPHIES ORCHESTRATIONAL
ORGANOCHLORINES ORGANOTHERAPIES ORTHOGONALITIES OSCILLOGRAPHIES
OSTEOARTHRITICS OSTEOPATHICALLY OVEREMPHASISING OVEREMPHASIZING
OVERENTHUSIASMS OVERHASTINESSES OXYHAEMOGLOBINS PACHYMENINGITIS
PALAEOGRAPHISTS PAMPHLETEERINGS PANTHEISTICALLY PARASYMPATHETIC
PARTHENOCARPIES PARTHENOGENESIS PATHOGENICITIES PEDAGOGUISHNESS
PERIHEPATITISES PERIPHERALITIES PERISHABILITIES PHALLOCENTRISMS
PHANTASMAGORIES PHANTASMALITIES PHARISAICALNESS PHARMACEUTICALS
PHARMACOGNOSIES PHARMACOPOEIANS PHARMACOPOEISTS PHARYNGOSCOPIES
PHENAKISTOSCOPE PHENETHYLAMINES PHENOBARBITONES PHENOMENALISING
PHENOMENALISTIC PHENOMENALITIES PHENYLTHIOUREAS PHILOSOPHASTERS
PHONEMICISATION PHONETICISATION PHOSPHOCREATINE PHOSPHOCREATINS
PHOSPHORYLATIVE PHOTODISSOCIATE PHOTODUPLICATES PHOTOELASTICITY
PHOTOENGRAVINGS PHRASEMONGERING PHRASEOGRAPHIES PHTHALOCYANINES
PHYLLOSILICATES PHYSICOCHEMICAL PHYSIOTHERAPIES PHYSIOTHERAPIST
PIGHEADEDNESSES PINHEADEDNESSES PITHECANTHROPUS PLAGIOCEPHALIES
PLAINCLOTHESMAN PLAINCLOTHESMEN POLYARTHRITIDES POLYARTHRITISES
POLYSACCHARIDES POLYSYNTHETICAL POSTHEMORRHAGIC POSTMASTERSHIPS
PRAISEWORTHIEST PREANAESTHETICS PREESTABLISHING PREHISTORICALLY
PROBATIONERSHIP PROSOPOGRAPHIES PROTOSPATHAIRES PSEPHOLOGICALLY
PSEUDAESTHESIAS PSEUDEPIGRAPHIC PSEUDEPIGRAPHON PSEUDOARTHROSIS
PSYCHEDELICALLY PSYCHOCHEMICALS PSYCHODELICALLY PSYCHOGENETICAL
PSYCHOGENICALLY PSYCHOGERIATRIC PSYCHOMETRICIAN PSYCHOSEXUALITY
PSYCHOTHERAPIES PSYCHOTHERAPIST PSYCHROMETRICAL PTERYLOGRAPHIES
PUNISHABILITIES PYRETOTHERAPIES PYROTECHNICIANS RADICULOPATHIES
RADIOTELEGRAPHS RADIOTELEPHONES RADIOTHERAPISTS REAUTHORISATION
REESTABLISHMENT REHABILITATIONS REHOSPITALISING REHOSPITALIZING
REHUMANIZATIONS REORCHESTRATING REORCHESTRATION RETHEORIZATIONS
RHEUMATOLOGISTS RHINENCEPHALONS RHINOSCLEROMATA RHYPAROGRAPHIES
RIGHTABLENESSES SACCHARIMETRIES SACCHAROMETRIES SCAPHOCEPHALICS
SCAPHOCEPHALIES SCAPHOCEPHALISM SCEUOPHYLACIUMS SCHEMATISATIONS
SCHEMATIZATIONS SCHILLERISATION SCHILLERIZATION SCHISTOSOMIASES
SCHIZOAFFECTIVE SCHOLARLINESSES SCHOOLMASTERING SCHOOLMASTERISH
SCHOOLTEACHINGS SCLEROTHERAPIES SCRATCHBUILDERS SCRIMSHANDERING
SEARCHABILITIES SEARCHINGNESSES SEAWORTHINESSES SEISMOGRAPHICAL
SELENOGRAPHICAL SELENOGRAPHISTS SEMILOGARITHMIC SEMIPORNOGRAPHY
SERVOMECHANICAL SERVOMECHANISMS SHERARDISATIONS SHERARDIZATIONS
SHILLYSHALLIERS SHOCKUMENTARIES SKETCHABILITIES SLEDGEHAMMERING
SOPHISTICATEDLY SOUTHEASTERLIES SPECTROGRAPHIES SPEECHIFICATION
SPELEOTHERAPIES SPHAEROSIDERITE SPHERICALNESSES SPHEROIDISATION
SPHEROIDIZATION SPHYGMOGRAPHIES SPINTHARISCOPES SPIROCHAETAEMIA
SPLANCHNOLOGIES SPORANGIOPHORES SQUEAMISHNESSES STADHOLDERSHIPS
STADTHOLDERSHIP STANDOFFISHNESS STEEPLECHASINGS STEGANOGRAPHIES
STEGANOGRAPHIST STEGOCEPHALIANS STEREOGRAPHICAL STOECHIOLOGICAL
STRAIGHTJACKETS STRATOSPHERICAL STREPHOSYMBOLIA SULFAMETHAZINES
SULPHACETAMIDES SULPHANILAMIDES SULPHATHIAZOLES SULPHINPYRAZONE
SUPERCARGOSHIPS SUPERHUMANISING SUPERHUMANITIES SUPERHUMANIZING
SYLLABOGRAPHIES SYMBOLOGRAPHIES SYMMETROPHOBIAS SYMPATHECTOMIES
SYMPATHETICALLY SYMPATHOMIMETIC SYNECDOCHICALLY SYNTHESISATIONS
SYNTHESIZATIONS SYNTHETISATIONS SYNTHETIZATIONS TECHNICALNESSES
TELAUTOGRAPHIES TETARTOHEDRISMS THALASSOCRACIES THALATTOCRACIES
THANATOGRAPHIES THANKWORTHINESS THAUMATOLATRIES THEATRICALISING
THEATRICALITIES THEOLOGISATIONS THEOLOGIZATIONS THEOSOPHISTICAL
THERIANTHROPISM THERMAESTHESIAS THERMALISATIONS THERMALIZATIONS
THERMOSTABILITY THERMOTHERAPIES THICKHEADEDNESS THINKABLENESSES
THORACOCENTESIS THORACOPLASTIES THREMMATOLOGIES TRAINSPOTTERISH
TRICHOMONACIDES TRIHALOMETHANES TRIIODOMETHANES TRIMETHYLAMINES
TRIPHENYLAMINES TRISOCTAHEDRONS UNANAESTHETISED UNANAESTHETIZED
UNAPPREHENSIBLE UNCHRISTIANISED UNCHRISTIANISES UNCHRISTIANIZED
UNCHRISTIANIZES UNCHRISTIANLIKE UNDEREMPHASISED UNDEREMPHASISES
UNDEREMPHASIZED UNDEREMPHASIZES UNEARTHLINESSES UNHEALTHINESSES
UNSEAWORTHINESS UNSHAPELINESSES UNSOPHISTICATED UNTHINKABLENESS
VAPOURISHNESSES WAPPENSCHAWINGS WEATHERISATIONS WEATHERIZATIONS
WEATHERLINESSES WHIMSICALNESSES WHIPPERSNAPPERS WITHDRAWNNESSES
ZINJANTHROPUSES ZYGOBRANCHIATES