There are 769 fifteen-letter words containing A, C and H, https://www.bestwordlist.com/c/a/3/15letterwordswithach.htm
ACANTHOCEPHALAN ACCOMPLISHMENTS ACCOUNTANTSHIPS ACETOPHENETIDIN
ACHONDROPLASIAS ACHONDROPLASTIC ACHROMATICITIES ACHROMATISATION
ACHROMATIZATION ACROPARESTHESIA ACTINOCHEMISTRY ACTINOTHERAPIES
ADIATHERMANCIES AFFRANCHISEMENT ALCOHOLISATIONS ALCOHOLIZATIONS
ALCOHOLOMETRIES ALGORITHMICALLY ALLOTRIOMORPHIC AMPHITHEATRICAL
ANACOLUTHICALLY ANAESTHETICALLY ANAMORPHOSCOPES ANARCHISTICALLY
ANTAPHRODISIACS ANTHROPOCENTRIC ANTHROPOGENETIC ANTHROPOLOGICAL
ANTHROPOMORPHIC ANTHROPOPHOBICS ANTHROPOPSYCHIC ANTIALCOHOLISMS
ANTIAPHRODISIAC ANTIARRHYTHMICS ANTICHOLESTEROL ANTICHOLINERGIC
ANTICHRISTIANLY ANTIHELMINTHICS ANTIHISTAMINICS ANTILOGARITHMIC
ANTIMONARCHICAL ANTIMONARCHISTS ANTIPHLOGISTICS ANTISYPHILITICS
ANTITHEORETICAL ANTITHROMBOTICS APPRENTICEHOODS APPRENTICESHIPS
APPROACHABILITY ARACHNOIDITISES ARCHAEBACTERIUM ARCHAEOBOTANIES
ARCHAEOBOTANIST ARCHAEOMETRISTS ARCHAEOPTERYXES ARCHAEZOOLOGIES
ARCHEOASTRONOMY ARCHEOBOTANISTS ARCHEOLOGICALLY ARCHEOMAGNETISM
ARCHEOZOOLOGIES ARCHEOZOOLOGIST ARCHGENETHLIACS ARCHIDIACONATES
ARCHIEPISCOPACY ARCHIEPISCOPATE ARCHITECTURALLY ARCHPRIESTHOODS
ARCHPRIESTSHIPS ASTROPHYSICALLY ASTROPHYSICISTS ATHEROSCLEROSES
ATHEROSCLEROSIS ATHEROSCLEROTIC ATMOSPHERICALLY AUTHENTICATIONS
AUTOCHTHONOUSLY AUTOGRAPHICALLY AUTOMORPHICALLY AUTOSCHEDIASTIC
AUTOSCHEDIAZING AUTOTROPHICALLY BACCHANALIANISM BACKSCRATCHINGS
BACTERIOPHAGIES BACTERIOPHAGOUS BATHOMETRICALLY BATHYMETRICALLY
BATRACHOPHOBIAS BENZANTHRACENES BIBLIOGRAPHICAL BIBLIOTHECARIES
BIOGEOCHEMICALS BIOGEOGRAPHICAL BIOMATHEMATICAL BIOMECHANICALLY
BIORHYTHMICALLY BLOCKHEADEDNESS BRACHIOCEPHALIC BRACHIOSAURUSES
BRACHISTOCHRONE BRACHYCEPHALICS BRACHYCEPHALIES BRACHYCEPHALISM
BRACHYCEPHALOUS BRACHYDACTYLIES BRACHYDACTYLISM BRACHYDACTYLOUS
BRACHYDIAGONALS BRACHYPINAKOIDS BRACHYTHERAPIES BRAUNSCHWEIGERS
BRONCHODILATORS BRONCHOGRAPHIES BRONCHOSCOPICAL CANTHAXANTHINES
CARDIOGRAPHICAL CATECHISTICALLY CATECHUMENSHIPS CATHETERISATION
CATHETERIZATION CATHODOGRAPHERS CATHODOGRAPHIES CATHOLICISATION
CATHOLICIZATION CEPHALOCHORDATE CEPHALOTHORACES CEPHALOTHORACIC
CEPHALOTHORAXES CERVICOGRAPHIES CHALCOGRAPHICAL CHALCOGRAPHISTS
CHAMBERLAINSHIP CHANCELLORSHIPS CHANGEABILITIES CHANGEFULNESSES
CHANNELISATIONS CHANNELIZATIONS CHANNELOPATHIES CHAPTALISATIONS
CHAPTALIZATIONS CHARACTERISABLE CHARACTERISTICS CHARACTERIZABLE
CHARGEABILITIES CHARTOGRAPHICAL CHEMAUTOTROPHIC CHEMICOPHYSICAL
CHEMOATTRACTANT CHEMOAUTOTROPHS CHEMOAUTOTROPHY CHEMOPSYCHIATRY
CHEMOTACTICALLY CHEMOTAXONOMIES CHEMOTAXONOMIST CHEMOTHERAPISTS
CHEMOTROPICALLY CHENOPODIACEOUS CHLAMYDOMONADES CHLORAMPHENICOL
CHLORITISATIONS CHLORITIZATIONS CHLOROTHIAZIDES CHLORPROMAZINES
CHLORPROPAMIDES CHLORTHALIDONES CHOLANGIOGRAPHY CHOLECALCIFEROL
CHOLESTEROLEMIA CHOLESTYRAMINES CHOLINERGICALLY CHOLINESTERASES
CHONDRICHTHYANS CHONDRIFICATION CHONDROCRANIUMS CHORDAMESODERMS
CHORIOALLANTOIC CHORIOALLANTOIS CHORIOCARCINOMA CHRESTOMATHICAL
CHROMATICNESSES CHROMATOGRAPHED CHROMATOGRAPHER CHROMATOGRAPHIC
CHROMATOLOGISTS CHROMATOPHOROUS CHROMATOSPHERES CHROMOTHERAPIES
CHROMOXYLOGRAPH CHRONOGRAMMATIC CHRONOLOGICALLY CHRONOTHERAPIES
CINCHONISATIONS CINCHONIZATIONS CINEANGIOGRAPHY CINEMATOGRAPHED
CINEMATOGRAPHER CINEMATOGRAPHIC CINEMICROGRAPHY CLAUSTROPHILIAS
CLAUSTROPHOBIAS CLEARHEADEDNESS CLIMATOGRAPHIES COCHAIRMANSHIPS
COLDHEARTEDNESS COLLENCHYMATOUS COMMANDANTSHIPS COMMISSARYSHIPS
COMPOTATIONSHIP COMPUTERPHOBIAS CONSERVATORSHIP CONSULTANTSHIPS
CORINTHIANISING CORINTHIANIZING COUNTERCHANGING COUNTERCHARGING
COUNTERCHARMING COUNTERMARCHING COUNTERSHADINGS CRASHWORTHINESS
CROTONALDEHYDES CRYPTAESTHESIAS CRYPTOGRAPHICAL CRYPTOGRAPHISTS
CRYSTALLOGRAPHY CYANOETHYLATING CYANOETHYLATION CYBERCHONDRIACS
CYCLOHEXYLAMINE CYPROHEPTADINES CYTOPATHOLOGIES CYTOPATHOLOGIST
DACTYLOGRAPHERS DACTYLOGRAPHIES DEBAUCHEDNESSES DECHLORINATIONS
DECHRISTIANISED DECHRISTIANISES DECHRISTIANIZED DECHRISTIANIZES
DECIPHERABILITY DEMOGRAPHICALLY DEMYTHIFICATION DEPHLOGISTICATE
DERMATOGLYPHICS DETACHABILITIES DIASTROPHICALLY DICHLOROETHANES
DICHLOROMETHANE DICHOTOMISATION DICHOTOMIZATION DICHROMATICISMS
DISACCHARIDASES DISENCHANTINGLY DISENCHANTMENTS DISENFRANCHISED
DISENFRANCHISES DISINHERITANCES DITHIOCARBAMATE DITHYRAMBICALLY
DOLICHOCEPHALIC DOLICHOSAURUSES DORSIBRANCHIATE ECHINODERMATOUS
ECHOCARDIOGRAMS ECOCATASTROPHES ECTOMYCORRHIZAE ECTOMYCORRHIZAS
ELECTROCHEMICAL ELECTROGRAPHIES ELECTROMYOGRAPH ELEUTHERODACTYL
ENCEPHALITOGENS ENCEPHALOGRAPHS ENCEPHALOGRAPHY ENCEPHALOPATHIC
ENCEPHALOTOMIES ENCHONDROMATOUS ENDOCRINOPATHIC ENDOTHERMICALLY
ENFRANCHISEMENT ESOPHAGOSCOPIES ETHERIFICATIONS ETHNOBIOLOGICAL
ETHNOHISTORICAL EUPHEMISTICALLY EUTROPHICATIONS EXCHANGEABILITY
FEATHERSTITCHED FEATHERSTITCHES FETISHISTICALLY FRENCHIFICATION
GEODEMOGRAPHICS GEOSTROPHICALLY GLOSSOGRAPHICAL GLYCERALDEHYDES
GLYPHOGRAPHICAL GLYPTOGRAPHICAL GRAMOPHONICALLY GRAPHICALNESSES
GYNANDROMORPHIC HAEMACYTOMETERS HAEMOCYTOMETERS HAEMOGLOBINURIC
HALLUCINATIONAL HALLUCINOGENICS HAMAMELIDACEOUS HARMONISTICALLY
HARPSICHORDISTS HEARTSICKNESSES HELIOMETRICALLY HELIOTROPICALLY
HEMICRYSTALLINE HEMOCHROMATOSES HEMOCHROMATOSIS HEMODYNAMICALLY
HENDECASYLLABIC HENDECASYLLABLE HEPATICOLOGICAL HEPATICOLOGISTS
HERESTHETICIANS HERMENEUTICALLY HETEROCERCALITY HETEROCHROMATIC
HETEROCHROMATIN HETERODACTYLOUS HETEROGRAPHICAL HETEROSCEDASTIC
HETEROSOCIALITY HEXACHLORETHANE HEXACHLOROPHANE HEXACHLOROPHENE
HIBERNICISATION HIBERNICIZATION HIERACOSPHINGES HIERACOSPHINXES
HIERARCHIZATION HISTOCHEMICALLY HISTOCOMPATIBLE HISTOPATHOLOGIC
HISTORIOGRAPHIC HOLOBLASTICALLY HOLOCRYSTALLINE HOLOGRAPHICALLY
HOMEOPATHICALLY HOMOCENTRICALLY HOMOCHLAMYDEOUS HOMOCHROMATISMS
HOMOPLASTICALLY HOMOSOCIALITIES HORTICULTURALLY HUMIDIFICATIONS
HYDROBIOLOGICAL HYDROCEPHALUSES HYDROCORALLINES HYDRODYNAMICIST
HYDROEXTRACTORS HYDROGEOLOGICAL HYDROMECHANICAL HYDROMETRICALLY
HYDROPATHICALLY HYDROSTATICALLY HYDROTROPICALLY HYGROMETRICALLY
HYGROSCOPICALLY HYLOZOISTICALLY HYPERACTIVITIES HYPERCALCAEMIAS
HYPERCATABOLISM HYPERCATALECTIC HYPERCOAGULABLE HYPERCRITICALLY
HYPERFUNCTIONAL HYPERGLYCAEMIAS HYPERMETROPICAL HYPERPHYSICALLY
HYPERREACTIVITY HYPERURICAEMIAS HYPERVIGILANCES HYPOCHONDRIACAL
HYPOCHONDRIASES HYPOCHONDRIASIS HYPOCHONDRIASMS HYPOCHONDRIASTS
HYPOCRYSTALLINE HYPSOMETRICALLY ICHTHYOPHAGISTS ICHTHYOSAURIANS
ICHTHYOSAURUSES ICOSITETRAHEDRA IDEOGRAPHICALLY IDIOMORPHICALLY
INHARMONICITIES INTERCHANGEABLE INTERCHANGEABLY INTERCHANGEMENT
INTERSCHOLASTIC IONOSPHERICALLY ISOTHIOCYANATES KAFFEEKLATSCHES
KINEMATOGRAPHIC KINESTHETICALLY LABYRINTHICALLY LEUCOCYTHAEMIAS
LEXICOGRAPHICAL LEXICOGRAPHISTS LICENTIATESHIPS LISSENCEPHALIES
LISSENCEPHALOUS LITHOCHROMATICS LOGARITHMICALLY LOGOGRAPHICALLY
LOPHOBRANCHIATE LYMPHOCYTOPENIA LYMPHOSARCOMATA MACHINABILITIES
MACRENCEPHALIAS MACRENCEPHALIES MACROPHOTOGRAPH MAGNETOCHEMICAL
MARCONIGRAPHING MASOCHISTICALLY MATCHLESSNESSES MATHEMATICISING
MATHEMATICIZING MATRIARCHALISMS MECHANISTICALLY MECHANOCHEMICAL
MECHANOMORPHISM MECHANORECEPTOR MEGALOCEPHALIES MEGALOCEPHALOUS
MELANCHOLICALLY MERCHANTABILITY MESATICEPHALIES MESATICEPHALOUS
METACHROMATISMS METAMATHEMATICS METAMORPHICALLY METAPHYSICISING
METAPHYSICIZING METATHEORETICAL MICROAEROPHILES MICROAEROPHILIC
MICROBAROGRAPHS MICROEARTHQUAKE MICROPHOTOGRAPH MICROPHYSICALLY
MICRORADIOGRAPH MISCHARACTERISE MISCHARACTERIZE MONOCHLAMYDEOUS
MONOCHROMATISMS MONOGRAPHICALLY MONOSACCHARIDES MORPHINOMANIACS
MORPHOLOGICALLY MULTICHARACTERS MUSICOTHERAPIES MYELENCEPHALONS
MYOCARDIOGRAPHS NEBUCHADNEZZARS NEMATHELMINTHIC NEUROPATHICALLY
NEUROPATHOLOGIC NEUROPSYCHIATRY NOMOGRAPHICALLY NONACHIEVEMENTS
NONARCHITECTURE NONBIOGRAPHICAL NONCARBOHYDRATE NONCHARISMATICS
NONHIERARCHICAL NONHISTORICALLY NONHYSTERICALLY NONMATHEMATICAL
NONMETAPHORICAL NONPHOTOGRAPHIC NONPSYCHIATRIST NONPSYCHOACTIVE
NONTHEISTICALLY NORTHCOUNTRYMAN NUDIBRANCHIATES OCEANOGRAPHICAL
OCHLOCRATICALLY OESOPHAGOSCOPES OLIGOCYTHAEMIAS OLIGOSACCHARIDE
OPHTHALMOSCOPES OPHTHALMOSCOPIC ORCHESOGRAPHIES ORCHESTRATIONAL
OREOGRAPHICALLY ORGANOCHLORINES ORGANOGRAPHICAL ORTHOCHROMATISM
ORTHODONTICALLY ORTHOPAEDICALLY ORTHOPSYCHIATRY OSCILLOGRAPHIES
OSTEOARTHRITICS OSTEOPATHICALLY OVERACHIEVEMENT OVERORCHESTRATE
PACHYMENINGITIS PALAEOANTHROPIC PALAEOGRAPHICAL PALEOGEOGRAPHIC
PANTHEISTICALLY PARAGRAPHICALLY PARAHELIOTROPIC PARASYMPATHETIC
PARENTHETICALLY PARTHENOCARPIES PARTHENOCARPOUS PARTHENOGENETIC
PATHOGENICITIES PATRIARCHALISMS PETROCHEMICALLY PHALLOCENTRISMS
PHARISAICALNESS PHARMACEUTICALS PHARMACODYNAMIC PHARMACOGENOMIC
PHARMACOGNOSIES PHARMACOGNOSIST PHARMACOGNOSTIC PHARMACOKINETIC
PHARMACOLOGICAL PHARMACOLOGISTS PHARMACOPOEIANS PHARMACOPOEISTS
PHARMACOPOLISTS PHARMACOTHERAPY PHARYNGOLOGICAL PHARYNGOSCOPIES
PHENAKISTOSCOPE PHENOMENALISTIC PHILANTHROPICAL PHILOSOPHICALLY
PHLOGISTICATING PHONAUTOGRAPHIC PHONEMICISATION PHONEMICIZATION
PHONETICISATION PHONETICIZATION PHONOCARDIOGRAM PHONOGRAMICALLY
PHOSPHOCREATINE PHOSPHOCREATINS PHOTOBIOLOGICAL PHOTOCHEMICALLY
PHOTODISSOCIATE PHOTODUPLICATED PHOTODUPLICATES PHOTOELASTICITY
PHOTOELECTRICAL PHOTOEXCITATION PHOTOGEOLOGICAL PHOTOGRAMMETRIC
PHOTOMACROGRAPH PHOTOMECHANICAL PHOTOMETRICALLY PHOTOMICROGRAPH
PHOTOREFRACTIVE PHOTOTACTICALLY PHOTOTROPICALLY PHOTOZINCOGRAPH
PHRENOLOGICALLY PHTHALOCYANINES PHYLLOSILICATES PHYSICOCHEMICAL
PHYSIOGRAPHICAL PHYSIOLOGICALLY PHYTOCHEMICALLY PHYTOGEOGRAPHIC
PHYTOPATHOGENIC PHYTOPLANKTONIC PITHECANTHROPUS PLAGIOCEPHALIES
PLAINCLOTHESMAN PLAINCLOTHESMEN PLATYHELMINTHIC POLYCHLORINATED
POLYCHROMATISMS POLYGRAPHICALLY POLYMORPHICALLY POLYSACCHARIDES
POLYSACCHAROSES POLYSYNTHETICAL POSTHEMORRHAGIC PREANAESTHETICS
PREHISTORICALLY PROCURATORSHIPS PROSENCHYMATOUS PSEPHOLOGICALLY
PSEUDEPIGRAPHIC PSYCHEDELICALLY PSYCHIATRICALLY PSYCHOACOUSTICS
PSYCHOANALYSERS PSYCHOANALYSING PSYCHOANALYZERS PSYCHOANALYZING
PSYCHOBIOGRAPHY PSYCHOCHEMICALS PSYCHODELICALLY PSYCHOGENETICAL
PSYCHOGENICALLY PSYCHOGERIATRIC PSYCHOGRAPHICAL PSYCHOHISTORIAN
PSYCHOLOGICALLY PSYCHOMETRICIAN PSYCHOPATHOLOGY PSYCHOSEXUALITY
PSYCHOTHERAPIES PSYCHOTHERAPIST PSYCHROMETRICAL PULMOBRANCHIATE
PYROTECHNICALLY PYROTECHNICIANS RADICULOPATHIES RADIOCHEMICALLY
RADIOPHONICALLY RADIOTELEPHONIC RECHOREOGRAPHED RECHROMATOGRAPH
REORCHESTRATING REORCHESTRATION REPROACHFULNESS RHEUMATOLOGICAL
RHINENCEPHALONS RHINOSCLEROMATA RHOMBENCEPHALON SACCHARIMETRIES
SACCHARISATIONS SACCHARIZATIONS SACCHAROMETRIES SACCHAROMYCETES
SADOMASOCHISTIC SAPROPHYTICALLY SARCENCHYMATOUS SCAPHOCEPHALICS
SCAPHOCEPHALIES SCAPHOCEPHALISM SCAPHOCEPHALOUS SCATHEFULNESSES
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 SPHAEROCRYSTALS SPHERICALNESSES
SPINTHARISCOPES SPIROCHAETAEMIA SPLANCHNOLOGIES STAPHYLOPLASTIC
STEEPLECHASINGS STEGOCEPHALIANS STEREOGRAPHICAL STOECHIOLOGICAL
STOICHIOLOGICAL STRAIGHTJACKETS STRATIGRAPHICAL STRATOSPHERICAL
SULPHACETAMIDES SUPERCARGOSHIPS SYCOPHANTICALLY SYMPATHECTOMIES
SYMPATHETICALLY SYMPATHOMIMETIC SYNCHRONISATION SYNCHRONISTICAL
SYNCHRONIZATION SYNECDOCHICALLY TACHOMETRICALLY TACHYARRHYTHMIA
TACHYMETRICALLY TEACHABLENESSES TECHNICALNESSES TECHNOLOGICALLY
TECTIBRANCHIATE TELEGRAPHICALLY TETRABRANCHIATE THALAMENCEPHALA
THALASSOCRACIES THALASSOGRAPHIC THALATTOCRACIES THANATOGNOMONIC
THEATRICALISING THEATRICALITIES THEATRICALIZING THEOREMATICALLY
THEOSOPHISTICAL THERAPEUTICALLY THERMODYNAMICAL THERMOREMANENCE
THICKHEADEDNESS THORACOCENTESES THORACOCENTESIS THORACOPLASTIES
THYROCALCITONIN TOPOGRAPHICALLY TOUCHABLENESSES TRANSHISTORICAL
TREACHEROUSNESS TRICHINISATIONS TRICHINIZATIONS TRICHLOROACETIC
TRICHLOROETHANE TRICHOMONACIDAL TRICHOMONACIDES TRISOCTAHEDRONS
TYPOGRAPHICALLY UNAUTHENTICALLY UNAUTHENTICATED UNCHALLENGEABLE
UNCHALLENGEABLY UNCHALLENGINGLY UNCHANGEABILITY UNCHOREOGRAPHED
UNCHRISTIANISED UNCHRISTIANISES UNCHRISTIANIZED UNCHRISTIANIZES
UNCHRISTIANLIKE UNCHRONOLOGICAL UNCOPYRIGHTABLE UNPHILOSOPHICAL
UNSOPHISTICATED UNTEACHABLENESS WAPPENSCHAWINGS WELTANSCHAUUNGS
WHATCHAMACALLIT WHIMSICALNESSES XENOMORPHICALLY XEROGRAPHICALLY
XYLOTYPOGRAPHIC ZOOGEOGRAPHICAL ZOOPHYTOLOGICAL ZYGOBRANCHIATES
ZYGOPHYLLACEOUS