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