There are 669 thirteen-letter words containing A, C, D and R, https://www.bestwordlist.com/c/a/4/13letterwordswithacdr.htm ACARIDOMATIUM ACARODOMATIUM ACCOMMODATORS ACCORDIONISTS ACCREDITATION ACHLORHYDRIAS ACIDIMETRICAL ACKNOWLEDGERS ADIAPHORISTIC ADIATHERMANCY ADRENALECTOMY ADRENOCEPTORS ADRENOCHROMES ADULARESCENCE ADVENTURISTIC AECIDIOSPORES AERODYNAMICAL AEROMEDICINES AMINOACIDURIA ANAPHRODISIAC ANDROCENTRISM ANDRODIOECISM ANTIDIURETICS ANTIPERIODICS APERIODICALLY APHRODISIACAL ARACHNOIDITIS ARCHDUCHESSES ARCHIDIACONAL ARCHIMANDRITE ARUNDINACEOUS ASTRODYNAMICS AUTOCORRECTED AUTODESTRUCTS BACHELORHOODS BACKGROUNDERS BACKGROUNDING BACKSCATTERED BACKSCRATCHED BACKSWORDSMAN BACKSWORDSMEN BACKWARDATION BACTERIOCIDAL BACTERIOCIDES BALDERLOCKSES BAREFACEDNESS BIDIRECTIONAL BIRDWATCHINGS BLACKBIRDINGS BLACKGUARDING BLACKGUARDISM BLADDERWRACKS BODYSNATCHERS BRACHYDACTYLY BRAGGADOCIOUS BRAINCHILDREN BREADCRUMBING BREAKDANCINGS BREECHLOADERS BROADCASTINGS CACKERMANDERS CALENDARISING CALENDARIZING CANDLEBERRIES CANDLEHOLDERS CANDLELIGHTER CANDLESNUFFER CARBOHYDRASES CARBOHYDRATES CARCINOMATOID CARDBOARDIEST CARDINALATIAL CARDINALITIAL CARDINALITIES CARDINALSHIPS CARDIOGRAPHER CARDIOGRAPHIC CARDIOLOGICAL CARDIOLOGISTS CARDIOPATHIES CARDIOPLEGIAS CARDIOVERSION CARDIOVERTERS CARDSHARPINGS CARRYFORWARDS CATERCORNERED CATHIODERMIES CATHODOGRAPHS CATHODOGRAPHY CEPHALORIDINE CHANGEAROUNDS CHARACTERISED CHARACTERIZED CHATEAUBRIAND CHECKERBOARDS CHEQUERBOARDS CHILDBEARINGS CHILDRENSWEAR CHILIAHEDRONS CHIMNEYBOARDS CHLAMYDOSPORE CHONDRIOSOMAL CHONDROBLASTS CHONDROCRANIA CHONDROMATOUS CHONDROSAMINE CHONDROSTIANS CHOREOGRAPHED CHOWDERHEADED CHURCHWARDENS CIRCUMGYRATED CIRCUMNUTATED CIRCUMROTATED CIRCUMSTANCED CLAIRAUDIENCE CLAIRAUDIENTS CLAPPERBOARDS CLAPPERCLAWED CLAVICHORDIST CLEARHEADEDLY COACHBUILDERS COADJUTORSHIP COADJUTRESSES COADMINISTERS COASTGUARDMAN COASTGUARDMEN COLDHEARTEDLY COMMANDEERING COMMANDERSHIP COMPARTMENTED COMRADELINESS CONCELEBRATED CONCORPORATED CONFEDERACIES CONFEDERATING CONFEDERATION CONFEDERATIVE CONGLOMERATED CONGRATULATED CONQUISTADORS CONSERVATISED CONSERVATIZED CONSIDERABLES CONSIDERANCES CONSIDERATELY CONSIDERATION CONSIDERATIVE CONSOLIDATORS CONSTRAINEDLY CONTAINERISED CONTAINERIZED CONTRABANDISM CONTRABANDIST CONTRADICTERS CONTRADICTING CONTRADICTION CONTRADICTIVE CONTRADICTORS CONTRADICTORY CONTRITURATED COORDINATIONS CORDIALNESSES CORDWAINERIES CORESIDENTIAL CORPOREALISED CORPOREALIZED COSTARDMONGER COTRANSDUCING COTRANSFERRED COTRANSPORTED COUNTERARGUED COUNTERBRACED COUNTERDEMAND COUNTERMANDED COUNTERPLAYED COUNTERPLEADS COUNTERRAIDED COUNTERSEALED COUNTERSTATED COUNTERTRADED COUNTERTRADES COUNTERVAILED CRABBEDNESSES CRAGGEDNESSES CREATUREHOODS CREDENTIALING CREDENTIALISM CREDENTIALLED CREDITABILITY CROSSBANDINGS CRYSTALLOIDAL CYBERCHONDRIA CYLINDRACEOUS CYLINDRICALLY DACTYLOGRAPHY DAUNORUBICINS DEARTICULATED DEARTICULATES DECARBONATING DECARBONATION DECARBONATORS DECARBONISERS DECARBONISING DECARBONIZERS DECARBONIZING DECARBOXYLASE DECARBOXYLATE DECARBURATION DECARBURISING DECARBURIZING DECARTELISING DECARTELIZING DECELERATIONS DECENTRALISED DECENTRALISES DECENTRALISTS DECENTRALIZED DECENTRALIZES DECEREBRATING DECEREBRATION DECHLORINATED DECHLORINATES DECLAMATORILY DECLARATIVELY DECLARATORILY DECLINATORIES DECOLORATIONS DECONCENTRATE DECONSECRATED DECONSECRATES DECORTICATING DECORTICATION DECORTICATORS DECRASSIFYING DECREPITATING DECREPITATION DECRIMINALISE DECRIMINALIZE DECRUSTATIONS DEFORCIATIONS DELIRIFACIENT DEMIURGICALLY DEMOCRATISERS DEMOCRATISING DEMOCRATIZERS DEMOCRATIZING DEMOGRAPHICAL DEMONOCRACIES DENDRITICALLY DENDROLOGICAL DENUCLEARISED DENUCLEARISES DENUCLEARIZED DENUCLEARIZES DEPRECATINGLY DEPRECATIVELY DEPRECATORILY DEPRECIATIONS DERACIALISING DERACIALIZING DERACINATIONS DERMATOPHYTIC DESACRALISING DESACRALIZING DESTRUCTIONAL DETERMINACIES DETRACTRESSES DETRUNCATIONS DEXTROCARDIAC DEXTROCARDIAS DIACHRONISTIC DIACRITICALLY DIAMETRICALLY DIAPHRAGMATIC DIATHERMACIES DIBRANCHIATES DICHLORACETIC DICHROMATISMS DICTATORIALLY DICTATORSHIPS DICTYOPTERANS DIFFRACTIVELY DIGRAPHICALLY DILACERATIONS DIORISTICALLY DIRECTORIALLY DISACCHARIDES DISACCREDITED DISAFFIRMANCE DISAPPEARANCE DISARTICULATE DISCANDERINGS DISCHARGEABLE DISCOGRAPHERS DISCOGRAPHIES DISCOLORATION DISCORDANCIES DISCORPORATED DISCORPORATES DISCREDITABLE DISCREDITABLY DISCREPANCIES DISCRETIONARY DISCRIMINABLE DISCRIMINABLY DISCRIMINANTS DISCRIMINATED DISCRIMINATES DISCRIMINATOR DISENCHANTERS DISENTRANCING DISFRANCHISED DISFRANCHISES DISGRACEFULLY DISINTRICATED DISINTRICATES DISPURVEYANCE DISSEVERANCES DISTRACTINGLY DISTRACTIVELY DIVARICATIONS DIVERTICULATE DOCKWALLOPERS DOCTRINAIRISM DOCTRINARIANS DOCTRINARISMS DOCUMENTARIAN DOCUMENTARIES DOCUMENTARILY DOCUMENTARISE DOCUMENTARIST DOCUMENTARIZE DODECAHEDRONS DOLICHOSAURUS DOMESTICATORS DOSIMETRICIAN DRACONIANISMS DRACUNCULUSES DRAMATURGICAL EDULCORATIONS ELECTRODERMAL ELECTROPLATED ENANTIODROMIC ENCHONDROMATA ENDOPARASITIC ENTERCHAUNGED EUDIOMETRICAL EXTRAJUDICIAL FERRICYANIDES FERROCYANIDES FLUIDEXTRACTS FRAUDULENCIES GILLRAVITCHED GLUCURONIDASE GONADOTROPHIC GRAMMATICISED GRAMMATICIZED GRANDCHILDREN GRANODIORITIC HANDCRAFTSMAN HANDCRAFTSMEN HANDICRAFTERS HANDKERCHIEFS HARDSCRABBLES HARMONICHORDS HEMICHORDATES HENCEFORWARDS HENDECAHEDRON HETERODACTYLS HEXACHLORIDES HYDNOCARPATES HYDRAULICALLY HYDRAULICKING HYDROCEPHALIC HYDROCEPHALUS HYDROCRACKERS HYDROCRACKING HYDRODYNAMICS HYDROMAGNETIC HYDROMETRICAL HYDROPATHICAL HYDROSCOPICAL HYDROSTATICAL HYDROTHERAPIC HYDROTHORACES HYDROTHORACIC HYDROXYACETIC HYPOCHONDRIAC HYPOCHONDRIAS IDEOGRAMMATIC IDEOGRAPHICAL IDIOSYNCRATIC IMPREDICATIVE INADVERTENCES INCARDINATING INCARDINATION INCARNADINING INCENDIARISMS INCONSIDERATE INDESCRIBABLE INDESCRIBABLY INDETERMINACY INDOCTRINATED INDOCTRINATES INDOCTRINATOR INTERCOMPARED INTERPANDEMIC ISOCARBOXAZID MACHAIRODONTS MACRODACTYLIC MACRODIAGONAL MACROPINACOID MACROPINAKOID MATCHBOARDING MEDICAMENTARY MEGALOCARDIAS MELODRAMATICS MERCHANDISERS MERCHANDISING MERCHANDIZERS MERCHANDIZING MERCURIALISED MERCURIALIZED MISADVERTENCE MITOCHONDRIAL MUCKSPREADERS MUCKSPREADING MULTIBRANCHED MYOCARDITISES NEUROFEEDBACK NONACCREDITED NONBROADCASTS NONDECREASING NONDEMOCRATIC NONINTERLACED NORADRENERGIC ORCHIDOMANIAC ORCHIDOMANIAS ORTHOPAEDICAL OUTRECUIDANCE OVERABUNDANCE OVERDECORATED OVERDECORATES OVERDOMINANCE OVERDRAMATICS OVEREDUCATING OVEREDUCATION OVERMEDICATED OVERMEDICATES PAEDIATRICIAN PALINDROMICAL PARADOXICALLY PARASCENDINGS PARASITICIDAL PARASITICIDES PARCHEDNESSES PARCHMENTISED PARCHMENTIZED PAROCHIALISED PAROCHIALIZED PARTICLEBOARD PARTICOLOURED PEDANTOCRATIC PEDIATRICIANS PEDICELLARIAE PENTACRINOIDS PERICHONDRIAL PERIODICALIST PERISSODACTYL PERPENDICULAR PICTORIALISED PICTORIALIZED PORCELAINISED PORCELAINIZED PORCELLANISED PORCELLANIZED POSTDOCTORALS POSTDOCTORATE POSTSECONDARY PREACQUAINTED PREADOLESCENT PRECONTRACTED PREDICABILITY PREDICAMENTAL PREDICATIVELY PREDOMINANCES PREFABRICATED PREJUDICATING PREJUDICATION PREJUDICATIVE PREJUDICIALLY PREMEDICATING PREMEDICATION PREORDINANCES PREPONDERANCE PREPONDERANCY PRESANCTIFIED PRIVATDOCENTS PROBOSCIDEANS PROBOSCIDIANS PROCATHEDRALS PROPAEDEUTICS PROTOCHORDATE PSEUDOCARPOUS PSEUDOSCALARS PTERODACTYLES PYRAMIDICALLY QUADRAPHONICS QUADRAPLEGICS QUADRATICALLY QUADRICIPITAL QUADRILOCULAR QUADRIPHONICS QUADRIPLEGICS QUADRISECTING QUADRISECTION QUADRIVALENCE QUADRIVALENCY QUADROPHONICS QUADRUPLICATE QUADRUPLICITY QUARTERBACKED QUARTERDECKER QUARTODECIMAN QUASIPERIODIC RADICALNESSES RADICULOPATHY RADIOACTIVATE RADIOACTIVELY RADIOACTIVITY RADIOBIOLOGIC RADIOCHEMICAL RADIOCHEMISTS RADIOISOTOPIC RADIOLOCATION RADIONUCLIDES RADIOPACITIES REACCELERATED REACCREDITING READMITTANCES REARTICULATED REBROADCASTED RECALCITRATED RECAPITALISED RECAPITALIZED RECAPITULATED RECATEGORIZED RECENTRALIZED RECOMMENDABLE RECOMMENDABLY RECONSECRATED RECONSOLIDATE RECONVALESCED REDECORATIONS REDEDICATIONS REDELIVERANCE REDUPLICATING REDUPLICATION REDUPLICATIVE RELANDSCAPING REVENDICATING REVENDICATION REVINDICATING REVINDICATION RHABDOMANCERS RHABDOMANCIES RHAPSODICALLY SACERDOTALISE SACERDOTALISM SACERDOTALIST SACERDOTALIZE SCALENOHEDRON SCANDALMONGER SCHADENFREUDE SCLERODERMATA SCLERODERMIAS SCRAPERBOARDS SCRATCHBOARDS SCRATCHBUILDS SCRIEVEBOARDS SCRIMSHANDERS SCRIMSHANDIED SCRIMSHANDIES SCROBICULATED SECONDARINESS SECTARIANISED SECTARIANIZED SEMICARBAZIDE SLOCKDOLAGERS SOUNDTRACKING SPADICIFLORAL SPERMATOCIDAL SPERMATOCIDES STICKHANDLERS STRAIGHTLACED STRAITLACEDLY SUBARACHNOIDS SUBCONTRACTED SUBDEACONRIES SUPERCALENDER TETRACHLORIDE TETRADRACHMAS TETRADRACHMON THENCEFORWARD THERMODYNAMIC THIOCARBAMIDE THOROUGHPACED TRADESCANTIAS TRADUCIANISMS TRADUCIANISTS TRAGICOMEDIES TRANSACTINIDE TRANSCENDENCE TRANSCENDENCY TRANSCENDENTS TRANSDUCTANTS TRANSDUCTIONS TRANSLUCIDITY TRICHOMONADAL TRICORPORATED TRISACCHARIDE TRISOCTAHEDRA TROGLODYTICAL TURACOVERDINS ULTRADISTANCE ULTRARADICALS UNAPPRECIATED UNARTICULATED UNASCERTAINED UNBARRICADING UNCHLORINATED UNCHRISTIANED UNCONSECRATED UNCONSTRAINED UNCOORDINATED UNCREATEDNESS UNDEPRECIATED UNDERACHIEVED UNDERACHIEVER UNDERACHIEVES UNDERACTIVITY UNDERCARRIAGE UNDERCHARGING UNDERCLASSMAN UNDERCLASSMEN UNDERCOATINGS UNDERCRACKERS UNDEREDUCATED UNDERFINANCED UNDERREACTING UNDERREACTION UNDERSURFACES UNDESCRIBABLE UNDISCOURAGED UNDISTRACTING UNDOCTRINAIRE UNPREDICTABLE UNPREDICTABLY UNSCABBARDING UNSCAVENGERED UNSTERCORATED VALEDICTORIAN VALEDICTORIES VERTICILLATED VINDICATORILY WEATHERCOCKED WOODCRAFTSMAN WOODCRAFTSMEN XANTHOCHROIDS