There are 522 thirteen-letter words containing A, C, D and L, https://www.bestwordlist.com/c/a/4/13letterwordswithacdl.htm ACADEMICALISM ACCIDENTALISM ACCIDENTALITY ACCIDENTOLOGY ACETALDEHYDES ACETAZOLAMIDE ACHLORHYDRIAS ACIDIMETRICAL ACIDOPHILUSES ACKNOWLEDGERS ACKNOWLEDGING ACOTYLEDONOUS ADIABATICALLY ADMINICULATED ADMINICULATES ADRENALECTOMY ADULARESCENCE AERODYNAMICAL AMYGDALACEOUS ANAPHYLACTOID ANECDOTALISMS ANECDOTALISTS ANECDOTICALLY APERIODICALLY APHRODISIACAL APODICTICALLY APPENDICULATE ARCHIDIACONAL ASYNDETICALLY AUTOCATALYSED AUTOCATALYZED BACHELORHOODS BACKPEDALLING BACTERIOCIDAL BALDERLOCKSES BENEDICTIONAL BICONDITIONAL BIDIRECTIONAL BIOPESTICIDAL BLACKBIRDINGS BLACKGUARDING BLACKGUARDISM BLADDERWRACKS BLOCKHEADEDLY BRACHYDACTYLY BRAINCHILDREN BREECHLOADERS CALENDARISING CALENDARIZING CANALICULATED CANDLEBERRIES CANDLEHOLDERS CANDLELIGHTED CANDLELIGHTER CANDLESNUFFER CARDINALATIAL CARDINALITIAL CARDINALITIES CARDINALSHIPS CARDIOLOGICAL CARDIOLOGISTS CARDIOPLEGIAS CENTUPLICATED CEPHALOPODANS CEPHALOPODOUS CEPHALORIDINE CHALCEDONYXES CHALCOGENIDES CHILDBEARINGS CHILDRENSWEAR CHILIAHEDRONS CHLAMYDOMONAS CHLAMYDOSPORE CHONDRIOSOMAL CHONDROBLASTS CHUCKLEHEADED CLADISTICALLY CLAIRAUDIENCE CLAIRAUDIENTS CLANDESTINELY CLANDESTINITY CLAPPERBOARDS CLAPPERCLAWED CLAUDICATIONS CLAVICHORDIST CLEARHEADEDLY CLINODIAGONAL CLINOPINACOID CLINOPINAKOID COACHBUILDERS COACHBUILDING CODECLINATION CODICOLOGICAL CODIFIABILITY COEDUCATIONAL COLDHEARTEDLY COLOQUINTIDAS COMPLICATEDLY COMRADELINESS CONCELEBRATED CONDITIONABLE CONDITIONALLY CONDYLOMATOUS CONGLOBULATED CONGLOMERATED CONGLUTINATED CONGRATULATED CONSIDERABLES CONSIDERATELY CONSOLIDATING CONSOLIDATION CONSOLIDATIVE CONSOLIDATORS CONSTRAINEDLY CORDIALNESSES CORESIDENTIAL CORPOREALISED CORPOREALIZED COUNTERPLAYED COUNTERPLEADS COUNTERSEALED COUNTERVAILED CREDENTIALING CREDENTIALISM CREDENTIALLED CREDITABILITY CRYSTALLOIDAL CYCLANDELATES CYCLOADDITION CYCLODIALYSES CYCLODIALYSIS CYCLOPAEDISTS CYLINDRACEOUS CYLINDRICALLY DACTYLIOMANCY DACTYLOGRAPHY DACTYLOLOGIES DATAVEILLANCE DEARTICULATED DEARTICULATES DECALCOMANIAS DECALESCENCES DECAPITALISED DECAPITALISES DECAPITALIZED DECAPITALIZES DECAPSULATING DECAPSULATION DECARBOXYLASE DECARBOXYLATE DECARTELISING DECARTELIZING DECASUALISING DECASUALIZING DECASYLLABICS DECASYLLABLES DECEIVABILITY DECELERATIONS DECENTRALISED DECENTRALISES DECENTRALISTS DECENTRALIZED DECENTRALIZES DECHLORINATED DECHLORINATES DECLAMATORILY DECLARATIVELY DECLARATORILY DECLASSIFYING DECLINATIONAL DECLINATORIES DECOLORATIONS DECRIMINALISE DECRIMINALIZE DECUMULATIONS DEDUPLICATING DEDUPLICATION DEFLOCCULANTS DEFLOCCULATED DEFLOCCULATES DEGLACIATIONS DELECTABILITY DELICATESSENS DELIRIFACIENT DEMAGOGICALLY DEMIURGICALLY DEMOGRAPHICAL DEMONOLOGICAL DENDRITICALLY DENDROLOGICAL DENTICULATELY DENTICULATION DENUCLEARISED DENUCLEARISES DENUCLEARIZED DENUCLEARIZES DEONTOLOGICAL DEPRECATINGLY DEPRECATIVELY DEPRECATORILY DERACIALISING DERACIALIZING DESACRALISING DESACRALIZING DESPICABILITY DESTRUCTIONAL DETACHABILITY DETECTABILITY DIACATHOLICON DIACRITICALLY DIALECTICALLY DIALECTICIANS DIALECTICISMS DIALOGISTICAL DIAMETRICALLY DICHLAMYDEOUS DICHLORACETIC DICTATORIALLY DIENCEPHALONS DIFFRACTIVELY DIFUNCTIONALS DIGRAPHICALLY DILACERATIONS DILUCIDATIONS DIORISTICALLY DIOTHELETICAL DIPSOMANIACAL DIRECTORIALLY DISAFFECTEDLY DISALLOWANCES DISARTICULATE DISCHARGEABLE DISCIPLINABLE DISCIPLINANTS DISCLAMATIONS DISCOLORATION DISCREDITABLE DISCREDITABLY DISCRIMINABLE DISCRIMINABLY DISFUNCTIONAL DISGRACEFULLY DISPLACEMENTS DISPLEASANCES DISSEMBLANCES DISSOCIALISED DISSOCIALISES DISSOCIALIZED DISSOCIALIZES DISTRACTINGLY DISTRACTIVELY DIVELLICATING DIVERTICULATE DOCKWALLOPERS DOCUMENTALIST DOCUMENTARILY DOLICHOCEPHAL DOLICHOSAURUS DOMICILIATING DOMICILIATION DOXOLOGICALLY DRACUNCULUSES DRAMATURGICAL DUALISTICALLY DULCIFICATION DUPLICABILITY DYOTHELETICAL DYOTHELITICAL DYSFUNCTIONAL DYSPEPTICALLY EDUCABILITIES EDUCATABILITY EDUCATIONALLY EDULCORATIONS ELECTRODERMAL ELECTROPLATED ENCYCLOPAEDIA ENCYCLOPAEDIC ENCYCLOPEDIAN ENCYCLOPEDIAS ENDOLYMPHATIC ENDONUCLEASES EUDIOMETRICAL EXCLUDABILITY EXTRAJUDICIAL FACTIONALISED FACTIONALIZED FICTIONALISED FICTIONALIZED FLACCIDNESSES FLUIDEXTRACTS FRAUDULENCIES GALACTOSIDASE GILLRAVITCHED GLUCURONIDASE GLYCOALKALOID GRANDCHILDREN HARDSCRABBLES HETERODACTYLS HEXACHLORIDES HEXACTINELLID HEXADACTYLOUS HYDRAULICALLY HYDRAULICKING HYDROCEPHALIC HYDROCEPHALUS HYDROMETRICAL HYDROPATHICAL HYDROSCOPICAL HYDROSTATICAL HYPOCYCLOIDAL IDENTICALNESS IDEOGRAPHICAL IDEOLOGICALLY IDIOMATICALLY IDIOPLASMATIC IDIOTICALNESS INCONDENSABLE INDESCRIBABLE INDESCRIBABLY INDISSOCIABLE INDISSOCIABLY INDUPLICATION INEDUCABILITY INTOXICATEDLY JUDGMATICALLY JUGLANDACEOUS KALEIDOSCOPES KALEIDOSCOPIC KNUCKLEHEADED LACKADAISICAL LAPIDESCENCES LEUCOPLASTIDS MACRODACTYLIC MACRODIAGONAL MALFUNCTIONED MEDIEVALISTIC MEGALOCARDIAS MELODRAMATICS MERCURIALISED MERCURIALIZED MISCALCULATED MISCATALOGUED MISCHANNELLED MISCLASSIFIED MITOCHONDRIAL MOLLUSCICIDAL MONODACTYLOUS MONONUCLEATED MULTIBRANCHED MULTIPLICANDS MUNICIPALISED MUNICIPALIZED NONACCIDENTAL NONCLASSIFIED NONCULTIVATED NONDETACHABLE NONDIPLOMATIC NONINDICTABLE NONINTERLACED NUCLEOCAPSIDS NUCLEOTIDASES OCCIDENTALISE OCCIDENTALISM OCCIDENTALIST OCCIDENTALIZE ODONTOBLASTIC ODONTOLOGICAL OLEANDOMYCINS ORTHOPAEDICAL PAEDOPHILIACS PALINDROMICAL PANDEMONIACAL PANDICULATION PARADOXICALLY PARASITICIDAL PAROCHIALISED PAROCHIALIZED PARTICLEBOARD PARTICOLOURED PEDAGOGICALLY PEDICELLARIAE PEDICULATIONS PEDUNCULATION PENTADACTYLES PENTADACTYLIC PEPTIDOGLYCAN PERICHONDRIAL PERIODICALIST PERISSODACTYL PERPENDICULAR PICTORIALISED PICTORIALIZED POLITICALISED POLITICALIZED POLYDACTYLIES POLYDACTYLISM POLYDACTYLOUS PORCELAINISED PORCELAINIZED PORCELLANISED PORCELLANIZED POSTDOCTORALS PREADOLESCENT PREDICABILITY PREDICAMENTAL PREDICATIVELY PREJUDICIALLY PROCATHEDRALS PSEUDOCLASSIC PSEUDOSCALARS PSYCHOBABBLED PTERODACTYLES PYRAMIDICALLY QUADRAPLEGICS QUADRATICALLY QUADRICIPITAL QUADRILOCULAR QUADRIPLEGICS QUADRIVALENCE QUADRIVALENCY QUADRUPLICATE QUADRUPLICITY QUINDECAPLETS QUINDECENNIAL QUODLIBETICAL RADICALNESSES RADICULOPATHY RADIOACTIVELY RADIOBIOLOGIC RADIOCHEMICAL RADIOLOCATION RADIONUCLIDES REACCELERATED REARTICULATED RECALCITRATED RECAPITALISED RECAPITALIZED RECAPITULATED RECENTRALIZED RECOMMENDABLE RECOMMENDABLY RECONSOLIDATE RECONVALESCED REDELIVERANCE REDUPLICATING REDUPLICATION REDUPLICATIVE RELANDSCAPING RHAPSODICALLY SACERDOTALISE SACERDOTALISM SACERDOTALIST SACERDOTALIZE SALICYLAMIDES SCALENOHEDRON SCANDALMONGER SCLERODERMATA SCLERODERMIAS SCRATCHBUILDS SCROBICULATED SECTIONALISED SECTIONALIZED SEXTUPLICATED SLOCKDOLAGERS SODOMITICALLY SPADICIFLORAL SPASMODICALLY SPERMATOCIDAL STEEPLECHASED STICKHANDLERS STICKHANDLING STRAIGHTLACED STRAITLACEDLY SUBADOLESCENT SUBCLASSIFIED SULFACETAMIDE SUPERCALENDER SYNDACTYLISMS SYNDICALISTIC SYNECDOCHICAL TECHNICALISED TECHNICALIZED TETRACHLORIDE TRANSLUCIDITY TRICHOMONADAL TROGLODYTICAL ULTRADISTANCE ULTRARADICALS UNARTICULATED UNCAPITALISED UNCAPITALIZED UNCHLORINATED UNCOMMENDABLE UNCOMMENDABLY UNCOMPLICATED UNCONDITIONAL UNDERCLASSMAN UNDERCLASSMEN UNDESCENDABLE UNDESCRIBABLE UNDIALECTICAL UNDISCUSSABLE UNIDEOLOGICAL UNMEDICINABLE UNPLASTICISED UNPLASTICIZED UNPREDICTABLE UNPREDICTABLY UNSPECIALISED UNSPECIALIZED VACATIONLANDS VALEDICTORIAN VALEDICTORIES VELOCIPEDEANS VELOCIPEDIANS VERTICILLATED VINDICABILITY VINDICATORILY VINYLCYANIDES ZYGODACTYLISM ZYGODACTYLOUS