There are 450 fourteen-letter words containing 2A, D and R, https://www.bestwordlist.com/c/a/4/14letterwordswithaadr.htm
ABSTRACTEDNESS ACCREDITATIONS ACHONDROPLASIA ADDRESSABILITY ADENOCARCINOMA
ADIATHERMANOUS ADMEASUREMENTS ADMINISTRATING ADMINISTRATION ADMINISTRATIVE
ADMINISTRATORS ADMINISTRATRIX ADMIRABILITIES ADORABLENESSES ADRENERGICALLY
ADRENOCORTICAL ADULARESCENCES ADVERBIALISING ADVERBIALIZING AERODYNAMICIST
AEROHYDROPLANE AGGRANDISEMENT AGGRANDIZEMENT AGROINDUSTRIAL ALLOTETRAPLOID
ALTITUDINARIAN AMBASSADORSHIP AMBASSADRESSES AMINOACIDURIAS ANACARDIACEOUS
ANAGRAMMATISED ANAGRAMMATIZED ANAPHRODISIACS ANDROCEPHALOUS ANIMADVERSIONS
ANTAPHRODISIAC ANTIDEMOCRATIC ANTIDEPRESSANT ANTIDERIVATIVE ANTIDIARRHEALS
ANTIDIARRHOEAL ANTIDROMICALLY ANTIFEDERALIST ANTIRADICALISM APPROPINQUATED
ARCHDEACONRIES ARCHIDIACONATE ARCHIMANDRITES ARTIFICIALISED ARTIFICIALIZED
ARTIODACTYLOUS ATTITUDINARIAN AUDIOMETRICIAN AUTORADIOGRAMS AUTORADIOGRAPH
AUTOTETRAPLOID BACKWARDATIONS BACKWARDNESSES BACTERICIDALLY BANDERSNATCHES
BANDSPREADINGS BASTARDISATION BASTARDIZATION BIODEGRADABLES BIODEGRADATION
BLACKGUARDISMS BLACKGUARDLIER BRACHYDACTYLIC BRACHYDIAGONAL BRACHYPINAKOID
BROBDINGNAGIAN BUREAUCRATISED BUREAUCRATIZED CADAVEROUSNESS CAPPARIDACEOUS
CARDIOGRAPHERS CARDIOGRAPHIES CARDIOMEGALIES CARDIOMYOPATHY CARDIOTHORACIC
CARDIOVASCULAR CATADIOPTRICAL CATHODOGRAPHER CHATEAUBRIANDS CIRCUMVALLATED
CLAIRAUDIENCES CLAIRAUDIENTLY COASTGUARDSMAN COASTGUARDSMEN COLLATERALISED
COLLATERALIZED CONNATURALISED CONNATURALIZED CONTAINERBOARD CONTRABANDISMS
CONTRABANDISTS CONTRADICTABLE CONTRAINDICANT CONTRAINDICATE DACTYLIOGRAPHY
DACTYLOGRAPHER DACTYLOGRAPHIC DAUGHTERBOARDS DEAMBULATORIES DEARTICULATING
DECARBONATIONS DECARBOXYLASES DECARBOXYLATED DECARBOXYLATES DECARBURATIONS
DECONTAMINATOR DEFAMILIARIZED DEFAMILIARIZES DEFLAGRABILITY DEGRANULATIONS
DEMATERIALISED DEMATERIALISES DEMATERIALIZED DEMATERIALIZES DEMOCRATICALLY
DEMORALISATION DEMORALIZATION DENATURALISING DENATURALIZING DEPARTMENTALLY
DEPOLARISATION DEPOLARIZATION DEREALISATIONS DEREALIZATIONS DERIVATIONALLY
DERIVATISATION DERIVATIZATION DERMATOGRAPHIA DERMATOGRAPHIC DERMATOLOGICAL
DERMATOPLASTIC DESQUAMATORIES DEVALORISATION DEVALORIZATION DEXTROCARDIACS
DIACHRONICALLY DIAGRAMMATICAL DIAMANTIFEROUS DIAPHANOMETERS DIATHERMANCIES
DIATHERMANEITY DIFFARREATIONS DISACCHARIDASE DISAFFIRMANCES DISAFFIRMATION
DISAGGREGATING DISAGGREGATION DISAGGREGATIVE DISAPPARELLING DISAPPEARANCES
DISAPPROBATION DISAPPROBATIVE DISAPPROBATORY DISAPPROPRIATE DISARRANGEMENT
DISARTICULATED DISARTICULATES DISARTICULATOR DISCEPTATORIAL DISCIPLINARIAN
DISCOGRAPHICAL DISCOURAGEABLE DISEMBARKATION DISEMBARRASSED DISEMBARRASSES
DISINCARCERATE DISNATURALISED DISNATURALISES DISNATURALIZED DISNATURALIZES
DISPARAGEMENTS DISSERTATIONAL DITHIOCARBAMIC DIVARICATINGLY DOCUMENTARIANS
DOLLARISATIONS DOLLARIZATIONS DOLLAROCRACIES DRACUNCULIASES DRACUNCULIASIS
DRAFTSMANSHIPS DRAMATISATIONS DRAMATIZATIONS DRAPEABILITIES DYNAMOMETRICAL
ECHOCARDIOGRAM ENANTIODROMIAS ENDOPARASITISM EPIGRAMMATISED EPIGRAMMATIZED
EXTRAORDINAIRE EXTRAPYRAMIDAL FAINTHEARTEDLY FEATHERBRAINED FEDERALISATION
FEDERALIZATION FRACTIONALISED FRACTIONALIZED GASTRODUODENAL GLADIATORSHIPS
GLUTARALDEHYDE GRADABLENESSES GRANDDAUGHTERS GRANDFATHERING GRANDSTANDINGS
GREATHEARTEDLY HABERDASHERIES HAEMODIALYSERS HAEMODIALYZERS HANDICRAFTSMAN
HANDICRAFTSMEN HARDHANDEDNESS HARDHEADEDNESS HARDINGGRASSES HEADMASTERLIER
HEADMASTERSHIP HEADQUARTERING HEAVYHEARTEDLY HYALURONIDASES HYDRODYNAMICAL
HYDROGRAPHICAL HYDROXYAPATITE IMMATERIALISED IMMATERIALIZED IMPARIDIGITATE
IMPONDERABILIA INCARDINATIONS INTERDIALECTAL INTERGRADATION INTERJACULATED
INTERLAMINATED INTRACARDIALLY INTRAMEDULLARY IRRATIONALISED IRRATIONALIZED
ISOCARBOXAZIDS ISODIAMETRICAL LABRADORESCENT LAMPADEDROMIES LAMPADEPHORIAS
LATITUDINARIAN MACRODACTYLIES MACRODACTYLOUS MACRODIAGONALS MACROPINACOIDS
MACROPINAKOIDS MALADMINISTERS MALAPPORTIONED MARCONIGRAPHED MATCHBOARDINGS
MELODRAMATISED MELODRAMATISES MELODRAMATISTS MELODRAMATIZED MELODRAMATIZES
METAGRABOLISED METAGRABOLIZED MISAPPRECIATED MISARTICULATED MONOSACCHARIDE
MOUNTAINBOARDS MYOCARDIOGRAPH MYOCARDIOPATHY NEANDERTHALERS NEANDERTHALOID
NEBUCHADNEZZAR NEMATODIRIASES NEMATODIRIASIS NEURAMINIDASES NONRADIOACTIVE
NONTRADITIONAL NORADRENALINES NORTHEASTWARDS NUDIBRANCHIATE ORCHARDGRASSES
ORCHIDOMANIACS ORTHODIAGONALS OVERABUNDANCES OVERABUNDANTLY OVERDRAMATISED
OVERDRAMATISES OVERDRAMATIZED OVERDRAMATIZES OVERELABORATED PACHYDERMATOUS
PAEDIATRICIANS PANCREATITIDES PANRADIOMETERS PARADIGMATICAL PARADISAICALLY
PARADISIACALLY PARADOXICALITY PARADOXOLOGIES PARALLELEPIPED PARALLELOPIPED
PARDONABLENESS PARTICLEBOARDS PARTICULARISED PARTICULARIZED PEDANTOCRACIES
PERSUADABILITY POLYACRYLAMIDE POLYSACCHARIDE POSTGRADUATION POSTPRANDIALLY
PREADAPTATIONS PREDESTINARIAN PREDEVALUATION PREMANDIBULARS PROCRASTINATED
PROPAEDEUTICAL PROPAGANDISERS PROPAGANDISING PROPAGANDISTIC PROPAGANDIZERS
PROPAGANDIZING PROSTAGLANDINS PSEUDEPIGRAPHA PSYCHODRAMATIC QUADRAGENARIAN
QUADRANGULARLY QUADRIGEMINATE QUADRILATERALS QUADRILITERALS QUADRISYLLABIC
QUADRISYLLABLE QUADRIVALENCES QUADRUMVIRATES QUADRUPLICATED QUADRUPLICATES
QUARTODECIMANS QUODLIBETARIAN RADIALISATIONS RADIALIZATIONS RADICALISATION
RADICALIZATION RADIOACTIVATED RADIOACTIVATES RADIOAUTOGRAPH RADIOLABELLING
RADIOLOCATIONS RADIOLOGICALLY RADIORESISTANT RADIOTELEGRAMS RADIOTELEGRAPH
RADIOTHERAPIES RADIOTHERAPIST RANDOMISATIONS RANDOMIZATIONS REACCLIMATISED
REACCLIMATIZED READABLENESSES REAPPROPRIATED REBROADCASTING RECONTAMINATED
REMANUFACTURED REMATERIALISED REMATERIALIZED RENATIONALISED RENATIONALIZED
RETROGRADATION REWARDABLENESS RHABDOMANTISTS RHEUMATOIDALLY SACERDOTALISED
SACERDOTALISES SACERDOTALISMS SACERDOTALISTS SACERDOTALIZED SACERDOTALIZES
SCANDALMONGERS SCATTERBRAINED SEMICARBAZIDES SHADOWGRAPHIES SHERARDISATION
SHERARDIZATION SKATEBOARDINGS SLANTENDICULAR SLANTINDICULAR SOLITUDINARIAN
SOUTHEASTWARDS SPORADICALNESS SQUANDERMANIAS STADHOLDERATES STADTHOLDERATE
STRAITJACKETED SUBARACHNOIDAL SUBMANDIBULARS SUPERABUNDANCE SUPERSATURATED
SUPRACHOROIDAL TATTERDEMALION TETRADACTYLIES TETRADACTYLOUS TETRADRACHMONS
TETRAETHYLLEAD THEATRICALISED THEATRICALIZED THIOCARBAMIDES THREADBARENESS
TRADITIONALISE TRADITIONALISM TRADITIONALIST TRADITIONALITY TRADITIONALIZE
TRADITIONARILY TRADUCIANISTIC TRANSABDOMINAL TRANSACTINIDES TRANSCENDENTAL
TRANSDUCTIONAL TRANSLITERATED TRISACCHARIDES TRISOCTAHEDRAL TYRANNOSAURIDS
ULTRACREPIDATE ULTRAHAZARDOUS ULTRAWIDEBANDS UNACCULTURATED UNAPPROPRIATED
UNDERCARRIAGES UNDERDRAINAGES UNDERGRADUATES UNDERSATURATED UNDERSTANDABLE
UNDERSTANDABLY UNDERVALUATION UNDRAMATICALLY UNFRACTIONATED UNMANUFACTURED
UNMATERIALISED UNMATERIALIZED UNMATRICULATED UNREADABLENESS UNSTANDARDISED
UNSTANDARDIZED UPGRADEABILITY VALEDICTORIANS VALETUDINARIAN VALETUDINARIES
VASODILATATORY VERNACULARISED VERNACULARIZED WATERBOARDINGS WEATHERBOARDED