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