There are 481 fourteen-letter words containing A, C, D, E and T, https://www.bestwordlist.com/c/a/5/14letterwordswithacdet.htm ABSTRACTEDNESS ACCIDENTALISMS ACCIDENTALNESS ACCREDITATIONS ACCUSTOMEDNESS ACETAZOLAMIDES ACKNOWLEDGMENT ADDICTEDNESSES ADRENOCORTICAL AERODYNAMICIST AFFECTEDNESSES ANDROCENTRISMS ANTIDEMOCRATIC ANTIDESICCANTS ANTISEPTICISED ANTISEPTICIZED APERIODICITIES APODEICTICALLY APPENDECTOMIES APPENDICECTOMY APPENDICITISES APPRENTICEHOOD ARCHIDIACONATE ARCHIMANDRITES ARCHPRIESTHOOD ARTIFICIALISED ARTIFICIALIZED AUDIOCASSETTES AUDIOMETRICIAN AUTODESTRUCTED AUTOSCHEDIASMS AUTOSCHEDIAZED AUTOSCHEDIAZES BACTERICIDALLY BANDERSNATCHES BASIDIOMYCETES BENEDICTIONALS BIDIALECTALISM BIOACCUMULATED BUREAUCRATISED BUREAUCRATIZED CALCULATEDNESS CANDIDATESHIPS CANDLELIGHTERS CARDIOCENTESES CARDIOCENTESIS CATHODOGRAPHER CELEBRATEDNESS CHATEAUBRIANDS CHICKENHEARTED CHLOROTHIAZIDE CHLORTHALIDONE CHONDROMATOSES CIRCUMVALLATED CLAIRAUDIENTLY COADMINISTERED COASTGUARDSMEN CODECLINATIONS COINCIDENTALLY COLLATERALISED COLLATERALIZED COLLOIDALITIES COMPASSIONATED CONCENTRATEDLY CONCEPTUALISED CONCEPTUALIZED CONDENSABILITY CONDENSATIONAL CONFEDERATIONS CONFIDENTIALLY CONNATURALISED CONNATURALIZED CONQUISTADORES CONSIDERATIONS CONSUETUDINARY CONTAINERBOARD CONTEXTUALISED CONTEXTUALIZED CONTRACTEDNESS CONTRADICTABLE CONTRAINDICATE COORDINATENESS CORINTHIANISED CORINTHIANIZED COSTARDMONGERS COUNTERCHANGED COUNTERCHARGED COUNTERCHARMED COUNTERCLAIMED COUNTERDEMANDS COUNTERDRAWING COUNTERMANDING COUNTERMARCHED COUNTERPLANNED COUNTERPLEADED COUNTERRAIDING COUNTERRALLIED COUNTERSHADING COUNTERSTAINED COUNTERTRADING CREDENTIALINGS CREDENTIALISMS CREDENTIALLING CREDITABLENESS CROTONALDEHYDE CYANOETHYLATED CYPROHEPTADINE DACTYLIOLOGIES DACTYLOGRAPHER DACTYLOSCOPIES DATAVEILLANCES DEARTICULATING DECAFFEINATING DECAMETHONIUMS DECAPITALISING DECAPITALIZING DECAPSULATIONS DECARBONATIONS DECARBOXYLATED DECARBOXYLATES DECARBURATIONS DECENTRALISING DECENTRALIZING DECEREBRATIONS DECHLORINATING DECHLORINATION DECHRISTIANISE DECHRISTIANIZE DECIDABILITIES DECIMALISATION DECIMALIZATION DECOLONISATION DECOLONIZATION DECOLORISATION DECOLORIZATION DECOMPENSATING DECOMPENSATION DECONCENTRATED DECONCENTRATES DECONSECRATING DECONSECRATION DECONTAMINANTS DECONTAMINATED DECONTAMINATES DECONTAMINATOR DECORATIVENESS DECORTICATIONS DECREPITATIONS DEDUPLICATIONS DEFLOCCULATING DEFLOCCULATION DELECTABLENESS DELICATENESSES DELIRIFACIENTS DELOCALISATION DELOCALIZATION DEMOCRATICALLY DENAZIFICATION DENITRIFICATOR DENSIFICATIONS DENTICULATIONS DEPRECIATINGLY DERMATOGLYPHIC DERMATOGRAPHIC DERMATOLOGICAL DERMATOPLASTIC DESPOTICALNESS DESPOTOCRACIES DETACHEDNESSES DETOXIFICATION DEXTROCARDIACS DIAGENETICALLY DIAHELIOTROPIC DIALECTOLOGIES DIALECTOLOGIST DIASTEREOMERIC DIATHERMANCIES DICHLOROETHANE DIELECTRICALLY DIFFRACTOMETER DIFFRACTOMETRY DIPTEROCARPOUS DIRECTIONALITY DISACCOMMODATE DISACCREDITING DISARTICULATED DISARTICULATES DISCAPACITATED DISCAPACITATES DISCEPTATORIAL DISCOMBOBERATE DISCOMBOBULATE DISCOMFORTABLE DISCONSOLATELY DISCONTINUANCE DISCOUNTENANCE DISCOURAGEMENT DISCRETIONALLY DISCRIMINATELY DISCRIMINATIVE DISENCHANTMENT DISENCHANTRESS DISINCARCERATE DISINCORPORATE DISINHERITANCE DISINTOXICATED DISINTOXICATES DISRESPECTABLE DISSOCIALITIES DISSYMMETRICAL DISTRACTEDNESS DIURETICALNESS DIVERTICULATED DOCTRINALITIES DOCUMENTALISTS DOCUMENTARIANS DOCUMENTARISED DOCUMENTARISES DOCUMENTARISTS DOCUMENTARIZED DOCUMENTARIZES DOCUMENTATIONS DODECAPHONISTS DOGMATICALNESS DOMESTICATIONS DOSIMETRICIANS DYNAMOELECTRIC DYNAMOMETRICAL EDRIOPHTHALMIC EDUCATEDNESSES EDUCATIONALIST ELECTRODYNAMIC ENCEPHALITIDES ENCYCLOPAEDIST ENDARTERECTOMY ENDOCARDITIDES ENDOCARDITISES ENDOCRINOPATHY ENDODONTICALLY ENDOPHYTICALLY ENDOSMOTICALLY EUDEMONISTICAL EXCOMMUNICATED FARFETCHEDNESS FRACTIONALISED FRACTIONALIZED GALACTOSIDASES GALEOPITHECOID GEODYNAMICISTS GONADECTOMISED GONADECTOMIZED HANDICRAFTSMEN HEDONISTICALLY HEPATECTOMISED HEPATECTOMIZED HERMAPHRODITIC HEXACTINELLIDS HYDROEXTRACTOR HYDROKINETICAL HYDROMAGNETICS HYDROPNEUMATIC HYPERACIDITIES HYPERDACTYLIES IDEALISTICALLY IDENTIFICATION IMMETHODICALLY INADVERTENCIES INCANDESCENTLY INCIDENTALNESS INDELICATENESS INDISCRIMINATE INSECTICIDALLY INTERDIALECTAL INTERJACULATED INTERMEDIACIES INTEROSCULATED INVOLUCELLATED IODOMETRICALLY ISODIAMETRICAL LABRADORESCENT LECYTHIDACEOUS LEPTODACTYLOUS MACRODACTYLIES MALCONTENTEDLY MATHEMATICISED MATHEMATICIZED MEDIAEVALISTIC MEDICALISATION MEDICALIZATION MEDICAMENTALLY METAPHYSICISED METAPHYSICIZED METHODICALNESS METHODOLOGICAL METOCLOPRAMIDE MISADVERTENCES MISAPPRECIATED MISARTICULATED MISTRANSCRIBED MULTICANDIDATE MULTICHAMBERED MULTICUSPIDATE MULTIDIALECTAL MULTINUCLEATED MUNDIFICATIVES NANOSTRUCTURED NONATTENDANCES NONCLANDESTINE NONCOMPLICATED NONDIRECTIONAL NONDOCTRINAIRE NONDOCUMENTARY NONEDUCATIONAL NONRADIOACTIVE NUDIBRANCHIATE OCCIDENTALISED OCCIDENTALISES OCCIDENTALISMS OCCIDENTALISTS OCCIDENTALIZED OCCIDENTALIZES ORTHOPEDICALLY OUTRECUIDANCES OVARIECTOMISED OVARIECTOMIZED OVERDECORATING OVERDECORATION OVEREDUCATIONS OVERMEDICATING OVERMEDICATION OVERSPECULATED OXIDOREDUCTASE PACHYDERMATOUS PAEDIATRICIANS PANCREATITIDES PARTICLEBOARDS PARTICULARISED PARTICULARIZED PEDANTOCRACIES PEDUNCULATIONS PENTADACTYLIES PENTADACTYLISM PENTADACTYLOUS PEPTIDOGLYCANS PERFECTIONATED PERICARDITIDES PERICARDITISES PERIODICALISTS PERISSODACTYLE PERISSODACTYLS PHLOGISTICATED PHOTODUPLICATE PLATINOCYANIDE POSTADOLESCENT POSTDOCTORATES PREADOLESCENTS PRECEDENTIALLY PREDICTABILITY PREJUDICATIONS PREMEDICATIONS PROCRASTINATED PROGNOSTICATED PROPAEDEUTICAL PROTOCHORDATES PROTRACTEDNESS PTERIDOLOGICAL PUNDITOCRACIES QUADRISECTIONS QUADRUPLICATED QUADRUPLICATES QUARTERDECKERS QUARTODECIMANS QUINTUPLICATED RADIOACTIVATED RADIOACTIVATES RADIOCHEMISTRY REACCLIMATISED REACCLIMATIZED REBROADCASTING RECODIFICATION RECOMMENDATION RECOMMENDATORY RECONCENTRATED RECONDENSATION RECONSOLIDATED RECONSOLIDATES RECONTAMINATED RECRYSTALLISED RECRYSTALLIZED REDISCOUNTABLE REDUPLICATIONS REINCORPORATED REMANUFACTURED REORCHESTRATED REVENDICATIONS REVINDICATIONS SACERDOTALISED SACERDOTALISES SACERDOTALISMS SACERDOTALISTS SACERDOTALIZED SACERDOTALIZES SANSCULOTTIDES SCATTERBRAINED SCHOOLMASTERED SCRATCHBUILDER SERODIAGNOSTIC SLANTENDICULAR STAPEDECTOMIES STARCHEDNESSES STRAITJACKETED STRUCTURALISED STRUCTURALIZED SUBADOLESCENTS SUBCATEGORISED SUBCATEGORIZED SULFACETAMIDES SULPHACETAMIDE SUSPERCOLLATED TETRACHLORIDES TETRADACTYLIES TETRADACTYLOUS TETRADRACHMONS THEATRICALISED THEATRICALIZED THENCEFORWARDS THERMODYNAMICS THIOCARBAMIDES THOROUGHBRACED TRANSACTINIDES TRANSCENDENCES TRANSCENDENTAL TRANSCENDENTLY TRANSCENDINGLY TRICHOMONACIDE TRISACCHARIDES TRISOCTAHEDRAL TRISOCTAHEDRON ULTRACIVILISED ULTRACIVILIZED ULTRACREPIDATE UNACCLIMATISED UNACCLIMATIZED UNACCOMMODATED UNACCULTURATED UNACCUSTOMEDLY UNAFFECTEDNESS UNCERTIFICATED UNCOMMUNICATED UNCONFEDERATED UNCONSOLIDATED UNCONTAMINATED UNCONTEMPLATED UNCONTRADICTED UNCORROBORATED UNCREDENTIALED UNCRYSTALLISED UNCRYSTALLIZED UNDECIDABILITY UNDERREACTIONS UNDERSECRETARY UNDERTENANCIES UNDISTRACTEDLY UNDOCTRINAIRES UNDOMESTICATED UNDOMESTICATES UNFRACTIONATED UNIDIRECTIONAL UNINCORPORATED UNMANUFACTURED UNMATRICULATED UNPEDANTICALLY UNPREDICTABLES UNRECIPROCATED UNROMANTICISED UNROMANTICIZED VALEDICTORIANS VERIDICALITIES VIDEOCASSETTES VINDICATRESSES XENODIAGNOSTIC