There are 476 fourteen-letter words containing A, C, G, I and T, https://www.bestwordlist.com/c/a/5/14letterwordswithacgit.htm
ACCELERATINGLY ACUPUNCTURINGS ADMINICULATING AESTHESIOGENIC AESTHETICISING
AESTHETICIZING AETIOLOGICALLY AGGLUTINOGENIC AGRICULTURALLY AGRICULTURISTS
AGROSTOLOGICAL ANAGRAMMATICAL ANGIOSARCOMATA ANGLICISATIONS ANGLICIZATIONS
ANTHROPOPHAGIC ANTIALLERGENIC ANTICARCINOGEN ANTICARIOGENIC ANTICOAGULANTS
ANTIESTROGENIC ANTIGENICITIES ANTIODONTALGIC ANTIPHLOGISTIC ANTITECHNOLOGY
APOLOGETICALLY APOPHLEGMATICS APOPHTHEGMATIC APOTHEGMATICAL ARACHNOLOGISTS
ARCHAEOLOGISTS ARCHGENETHLIAC ARTERIOGRAPHIC ASTIGMATICALLY ASTROLOGICALLY
AUTHENTICATING AUTOBIOGRAPHIC AUTOCATALYSING AUTOCATALYZING AUTOCORRECTING
BACKSCATTERING BACKSCRATCHING BACTERIOLOGIES BACTERIOLOGIST BACTERIOPHAGES
BACTERIOPHAGIC BATHYGRAPHICAL BIOCLIMATOLOGY BIOGENETICALLY BLACKSMITHINGS
BRANCHIOSTEGAL CABINETMAKINGS CALIGINOSITIES CALLIGRAPHISTS CAMPANOLOGISTS
CANDLELIGHTERS CARCINOLOGISTS CARPETBAGGINGS CARTOGRAPHICAL CATEGORISATION
CATEGORIZATION CENTRIFUGALISE CENTRIFUGALIZE CENTRIFUGATION CENTUPLICATING
CHALCOGRAPHIST CHARACTERISING CHARACTERIZING CHARTOGRAPHIES CHIROGRAPHISTS
CHLORARGYRITES CHLOROARGYRITE CHROMATOLOGIES CHROMATOLOGIST CINEMATOGRAPHS
CINEMATOGRAPHY CIRCUMGYRATING CIRCUMGYRATION CIRCUMGYRATORY CIRCUMNAVIGATE
CIRCUMNUTATING CIRCUMROTATING CIRCUMSTANCING CLIMATOLOGICAL CLIMATOLOGISTS
COGITATIVENESS COGNOMINATIONS COINVESTIGATOR COLLEGIALITIES COMETOGRAPHIES
COMPAGINATIONS COMPARTMENTING COMPURGATORIAL CONCELEBRATING CONCORPORATING
CONDITIONATING CONFIGURATIONS CONFLAGRATIONS CONGENIALITIES CONGENITALNESS
CONGLOBULATING CONGLOBULATION CONGLOMERATING CONGLOMERATION CONGLOMERATIVE
CONGLUTINATING CONGLUTINATION CONGLUTINATIVE CONGLUTINATORS CONGRATULATING
CONGRATULATION CONGRATULATIVE CONGREGATIONAL CONSERVATISING CONSERVATIZING
CONSIGNATORIES CONTAGIOUSNESS CONTAINERISING CONTAINERIZING CONTRAGESTIONS
CONTRAGESTIVES CONTRITURATING COSMOGRAPHISTS COTRANSFERRING COTRANSPORTING
COUNTERARGUING COUNTERBRACING COUNTERDRAWING COUNTERMANDING COUNTERPLAYING
COUNTERRAIDING COUNTERSEALING COUNTERSHADING COUNTERSTATING COUNTERTRADING
COUNTERVAILING CREDENTIALINGS CREDENTIALLING CROSSHATCHINGS CRYPTOGRAPHIES
CRYPTOGRAPHIST CYBERSQUATTING CYBERSTALKINGS CYTOPATHOGENIC DACTYLIOGRAPHY
DACTYLIOLOGIES DACTYLOGRAPHIC DEARTICULATING DECAFFEINATING DECAPITALISING
DECAPITALIZING DECENTRALISING DECENTRALIZING DECHLORINATING DECOMPENSATING
DECONSECRATING DEFLOCCULATING DEPRECIATINGLY DERMATOGLYPHIC DERMATOGRAPHIC
DERMATOLOGICAL DIAGENETICALLY DIAGNOSTICALLY DIAGNOSTICIANS DIAGRAMMATICAL
DIALECTOLOGIES DIALECTOLOGIST DIGNIFICATIONS DISACCREDITING DISACCUSTOMING
DISASSOCIATING DISCORPORATING DISCOURAGEMENT DISCRIMINATING DISINTRICATING
DIVARICATINGLY DOGMATICALNESS ECTYPOGRAPHIES EGOCENTRICALLY ELECTROGRAPHIC
ELECTROPLATING ENCEPHALITOGEN ENTERCHAUNGING EPEXEGETICALLY EPIGENETICALLY
EPIGRAMMATICAL EQUIVOCATINGLY ERGASTOPLASMIC ESCHATOLOGICAL ESCHATOLOGISTS
ESTROGENICALLY ETHNOGRAPHICAL ETHNOLOGICALLY ETYMOLOGICALLY EULOGISTICALLY
EXACTINGNESSES EXCRUCIATINGLY EXTRAVAGANCIES FACTIONALISING FACTIONALIZING
FANTASTICATING FIBROCARTILAGE FICTIONALISING FICTIONALIZING FRACTOGRAPHIES
GALACTOMETRIES GALACTOPOIESES GALACTOPOIESIS GALACTOPOIETIC GALACTOSAEMIAS
GALACTOSAMINES GALACTOSIDASES GALEOPITHECINE GALEOPITHECOID GALLICISATIONS
GALLICIZATIONS GALVANOPLASTIC GASTROSCOPISTS GEMEINSCHAFTEN GENETHLIACALLY
GENETHLIALOGIC GENTRIFICATION GEOCENTRICALLY GEODYNAMICISTS GEOGNOSTICALLY
GEOPOLITICALLY GEOPOLITICIANS GEOSTRATEGICAL GERONTOCRACIES GERONTOLOGICAL
GESTICULATIONS GIGANTICNESSES GIGANTOMACHIAS GIGANTOMACHIES GILLRAVITCHING
GLORIFICATIONS GLYCOSYLATIONS GONADECTOMISED GONADECTOMIZED GRAMMATICALITY
GRAMMATICASTER GRAMMATICISING GRAMMATICIZING GRATICULATIONS GRATIFICATIONS
GYNAECOLOGISTS GYNAECOMASTIAS GYNAECOMASTIES GYROSTATICALLY HAEMATOGENETIC
HAEMATOLOGICAL HEPATICOLOGIES HEPATICOLOGIST HERPETOLOGICAL HIEROGRAMMATIC
HISTOGENICALLY HISTOLOGICALLY HYDROMAGNETICS HYETOGRAPHICAL IATROGENICALLY
ICHTHYOLOGICAL ICHTHYOPHAGIES ICHTHYOPHAGIST ICHTHYOPHAGOUS ILLEGITIMACIES
ILLOGICALITIES INCAPACITATING INCOGITABILITY INDOCTRINATING INTERCOMPARING
INTOXICATINGLY INTRANSIGEANCE INTRANSIGENCES JINGOISTICALLY LACTOGLOBULINS
LARYNGECTOMIES LARYNGOSCOPIST LAUGHINGSTOCKS LEGALISTICALLY LETTERSPACINGS
LEXICOGRAPHIST LIGNIFICATIONS LINGUISTICALLY LINGUISTICIANS LITHOGRAPHICAL
LITHOLOGICALLY MACROMARKETING MAGNETOSPHERIC MAGNETOSTATICS MAGNIFICATIONS
MALFUNCTIONING MANUFACTURINGS MARTYROLOGICAL MATCHBOARDINGS MEGAKARYOCYTIC
METACOGNITIONS METACOMPUTINGS METALINGUISTIC METALLOGENETIC METALLOGRAPHIC
METEOROGRAPHIC METEOROLOGICAL METHODOLOGICAL METROLOGICALLY MICROGRAVITIES
MICROMARKETING MICROPEGMATITE MISCALCULATING MISCATALOGUING MISCEGENATIONS
MISOGYNISTICAL MISPUNCTUATING MORGANATICALLY MUTAGENICITIES MYSTAGOGICALLY
MYTHOLOGICALLY NARRATOLOGICAL NARROWCASTINGS NOCTIVAGATIONS NONCIRCULATING
NONGENETICALLY NONGEOMETRICAL NONGRAMMATICAL NONINTERACTING NONSIGNIFICANT
NONTHEOLOGICAL NYCTAGINACEOUS OCTINGENTENARY OLFACTOLOGISTS OLIGOCYTHAEMIA
ONYCHOPHAGISTS OPHTHALMOLOGIC OPISTHOGRAPHIC ORGANOMETALLIC ORNITHOLOGICAL
OROGENETICALLY ORTHOGENICALLY ORTHOGRAPHICAL OSTEOLOGICALLY OVERDECORATING
OVERMEDICATING PAGANISTICALLY PALAEOMAGNETIC PALEOECOLOGIST PALINGENETICAL
PANGENETICALLY PANTOGRAPHICAL PANTOPRAGMATIC PARADIGMATICAL PARALINGUISTIC
PARCHMENTISING PARCHMENTIZING PATHOLOGICALLY PEPTIDOGLYCANS PETROGRAPHICAL
PETROLOGICALLY PHANTASMAGORIC PHARMACOLOGIST PHLEGMATICALLY PHLEGMATICNESS
PHLOGISTICATED PHLOGISTICATES PHOTOGENICALLY PHOTOGRAPHICAL PHYTOGENETICAL
PHYTOLOGICALLY PICTORIALISING PICTORIALIZING PLACENTOLOGIES PLANETOLOGICAL
PNEUMOGASTRICS POLITICALISING POLITICALIZING POSTCOLLEGIATE POSTGANGLIONIC
POSTSURGICALLY PRAGMATICALITY PREACQUAINTING PRECONTRACTING PREFABRICATING
PRESANCTIFYING PRIMATOLOGICAL PROGNOSTICATED PROGNOSTICATES PROGNOSTICATOR
PROPAGANDISTIC PTERIDOLOGICAL PTERYLOGRAPHIC PUGILISTICALLY QUARTERBACKING
REACCELERATING REARTICULATING REBROADCASTING RECALCITRATING RECAPITALISING
RECAPITALIZING RECAPITULATING RECATEGORIZING RECENTRALIZING RECONSECRATING
RECTANGULARITY RIGIDIFICATION SANGUIFICATION SCHIZOGNATHOUS SCHOOLTEACHING
SCINTIGRAPHIES SECTARIANISING SECTARIANIZING SECTIONALISING SECTIONALIZING
SERODIAGNOSTIC SEXTUPLICATING SHADOWCASTINGS SIGNIFICATIONS SOPHISTICATING
SOTERIOLOGICAL SOVIETOLOGICAL SPECTROGRAPHIC SPECTROLOGICAL SPONGIOBLASTIC
STAGECOACHINGS STEEPLECHASING STEGANOGRAPHIC STEGOCEPHALIAN STENOGRAPHICAL
STICKHANDLINGS STOMATOGASTRIC STOMATOLOGICAL STRAIGHTJACKET STYLOGRAPHICAL
SUBCATEGORISED SUBCATEGORISES SUBCATEGORIZED SUBCATEGORIZES SUBCONTRACTING
SUPPLICATINGLY SYCOPHANTISING SYCOPHANTIZING SYNERGETICALLY TACHYGRAPHICAL
TACHYGRAPHISTS TAUTOLOGICALLY TECHNICALISING TECHNICALIZING TECHNOGRAPHIES
TELANGIECTASES TELANGIECTASIA TELANGIECTASIS TELANGIECTATIC TELAUTOGRAPHIC
TELECOTTAGINGS TELEOLOGICALLY TELEVANGELICAL TERATOGENICIST TERATOGENICITY
TERMINOLOGICAL THANATOLOGICAL THAUMATURGICAL THERMOMAGNETIC TRAGICALNESSES
TRAGICOMICALLY TRANSCENDINGLY TROPOLOGICALLY TURBOCHARGINGS ULTRAENERGETIC
UNCHRISTIANING UNCONGENIALITY UNCONSECRATING UNDOGMATICALLY UNINTOXICATING
VOLCANOLOGISTS VULCANOLOGISTS WEATHERCOCKING XENODIAGNOSTIC ZYGOBRANCHIATE
ZYGODACTYLISMS