There are 600 thirteen-letter words containing A, C, D, I and T, https://www.bestwordlist.com/c/a/5/13letterwordswithacdit.htm ACARIDOMATIUM ACARODOMATIUM ACCIDENTALISM ACCIDENTALITY ACCIDENTOLOGY ACCOMMODATING ACCOMMODATION ACCOMMODATIVE ACCORDIONISTS ACCREDITATION ACETAZOLAMIDE ACIDIFICATION ACIDIMETRICAL ADDICTIVENESS ADENOIDECTOMY ADIABATICALLY ADIAPHORISTIC ADIATHERMANCY ADJUDICATIONS ADMINICULATED ADMINICULATES ADVENTURISTIC AESTHETICISED AESTHETICIZED ANAPHYLACTOID ANDROCENTRISM ANECDOTALISMS ANECDOTALISTS ANECDOTICALLY ANTIDESICCANT ANTIDIABETICS ANTIDIURETICS ANTIPERIODICS ANTIPESTICIDE ANTISPASMODIC APODICTICALLY APPENDICULATE ARACHNOIDITIS ARCHIMANDRITE ASTRODYNAMICS ASYNDETICALLY AUDIOCASSETTE AUTHENTICATED AUTOSCHEDIASM AUTOSCHEDIAZE BACKWARDATION BACKWOODSIEST BACTERIOCIDAL BACTERIOCIDES BASIDIOMYCETE BENEDICTIONAL BICONDITIONAL BIDIRECTIONAL BIOPESTICIDAL BIRDWATCHINGS BROADCASTINGS CANALICULATED CANDIDATESHIP CANDLELIGHTED CANDLELIGHTER CARCINOMATOID CARDBOARDIEST CARDINALATIAL CARDINALITIAL CARDINALITIES CARDIOLOGISTS CARDIOPATHIES CARDIOVERTERS CATHIODERMIES CENTUPLICATED CHARACTERISED CHARACTERIZED CHATEAUBRIAND CHONDROSTIANS CIRCUMGYRATED CIRCUMNUTATED CIRCUMROTATED CIRCUMSTANCED CLADISTICALLY CLAIRAUDIENTS CLANDESTINELY CLANDESTINITY CLAUDICATIONS CLAVICHORDIST COADAPTATIONS COADJUTORSHIP COADMINISTERS COCCIDIOSTATS CODECLINATION CODIFIABILITY CODIFICATIONS COEDUCATIONAL COLOQUINTIDAS COMMENDATIONS COMPLICATEDLY CONDEMNATIONS CONDENSATIONS CONDITIONABLE CONDITIONALLY CONDITIONATED CONDITIONATES CONFEDERATING CONFEDERATION CONFEDERATIVE CONGLUTINATED CONQUISTADORS CONSERVATISED CONSERVATIZED CONSIDERATELY CONSIDERATION CONSIDERATIVE CONSOLIDATING CONSOLIDATION CONSOLIDATIVE CONSOLIDATORS CONSTRAINEDLY CONTAINERISED CONTAINERIZED CONTRABANDISM CONTRABANDIST CONTRADICTERS CONTRADICTING CONTRADICTION CONTRADICTIVE CONTRADICTORS CONTRADICTORY CONTRITURATED COORDINATIONS CORESIDENTIAL COTRANSDUCING COUNTERRAIDED COUNTERVAILED CREDENTIALING CREDENTIALISM CREDENTIALLED CREDITABILITY CRYSTALLOIDAL CUSTODIANSHIP CYCLOADDITION CYCLOPAEDISTS CYTODIAGNOSES CYTODIAGNOSIS DACTYLIOMANCY DACTYLOLOGIES DAMNIFICATION DANDIFICATION DATAVEILLANCE DEACTIVATIONS DEARTICULATED DEARTICULATES DECAFFEINATED DECAFFEINATES DECAMETHONIUM DECAPITALISED DECAPITALISES DECAPITALIZED DECAPITALIZES DECAPITATIONS DECAPSULATING DECAPSULATION DECARBONATING DECARBONATION DECARBURATION DECARTELISING DECARTELIZING DECEIVABILITY DECELERATIONS DECENTRALISED DECENTRALISES DECENTRALISTS DECENTRALIZED DECENTRALIZES DECEREBRATING DECEREBRATION DECHLORINATED DECHLORINATES DECLAMATORILY DECLARATIVELY DECLARATORILY DECLINATIONAL DECLINATORIES DECOLORATIONS DECONTAMINANT DECONTAMINATE DECORTICATING DECORTICATION DECORTICATORS DECREPITATING DECREPITATION DECRUSTATIONS DECUMULATIONS DEDUPLICATING DEDUPLICATION DEFORCIATIONS DEGLACIATIONS DELECTABILITY DELICATESSENS DELIRIFACIENT DEMOCRATISERS DEMOCRATISING DEMOCRATIZERS DEMOCRATIZING DENDRITICALLY DENSIFICATION DENTICULATELY DENTICULATION DENUNCIATIONS DEONTOLOGICAL DEPRECATINGLY DEPRECATIVELY DEPRECATORILY DEPRECIATIONS DERACINATIONS DERMATOPHYTIC DESANCTIFYING DESPICABILITY DESTRUCTIONAL DETACHABILITY DETECTABILITY DETERMINACIES DETOXICATIONS DETRUNCATIONS DEXTROCARDIAC DEXTROCARDIAS DIACATHOLICON DIACHRONISTIC DIACRITICALLY DIAGNOSTICIAN DIALECTICALLY DIALECTICIANS DIALECTICISMS DIALOGISTICAL DIAMETRICALLY DIAPHRAGMATIC DIATHERMACIES DIATOMICITIES DIBRANCHIATES DICHLORACETIC DICHROMATISMS DICTATORIALLY DICTATORSHIPS DICTYOPTERANS DIFFRACTIVELY DIFUNCTIONALS DIGNIFICATION DIJUDICATIONS DILACERATIONS DILUCIDATIONS DIORISTICALLY DIOTHELETICAL DIRECTORIALLY DISACCREDITED DISACCUSTOMED DISAFFECTEDLY DISAFFECTIONS DISARTICULATE DISASSOCIATED DISASSOCIATES DISCAPACITATE DISCEPTATIONS DISCEPTATIOUS DISCIPLINANTS DISCLAMATIONS DISCOLORATION DISCORPORATED DISCORPORATES DISCREDITABLE DISCREDITABLY DISCRETIONARY DISCRIMINANTS DISCRIMINATED DISCRIMINATES DISCRIMINATOR DISENCHANTERS DISENCHANTING DISENTRANCING DISFUNCTIONAL DISINFECTANTS DISINTOXICATE DISINTRICATED DISINTRICATES DISPLACEMENTS DISSOCIATIONS DISTRACTINGLY DISTRACTIVELY DIVARICATIONS DIVELLICATING DIVERTICULATE DOCTRINAIRISM DOCTRINARIANS DOCTRINARISMS DOCUMENTALIST DOCUMENTARIAN DOCUMENTARIES DOCUMENTARILY DOCUMENTARISE DOCUMENTARIST DOCUMENTARIZE DOCUMENTATION DODECAPHONIST DOMESTICATING DOMESTICATION DOMESTICATIVE DOMESTICATORS DOMICILIATING DOMICILIATION DOOMWATCHINGS DOSIMETRICIAN DRAMATURGICAL DUALISTICALLY DULCIFICATION DUPLICABILITY DYOTHELETICAL DYOTHELITICAL DYSFUNCTIONAL DYSPEPTICALLY EDUCABILITIES EDUCATABILITY EDUCATIONALLY EDUCATIONESES EDUCATIONISTS EDULCORATIONS ENANTIODROMIC ENDOLYMPHATIC ENDOPARASITIC EQUIDISTANCES EUDAEMONISTIC EUDAIMONISTIC EUDIOMETRICAL EXCLUDABILITY EXTRAJUDICIAL FACTIONALISED FACTIONALIZED FANTASTICATED FICTIONALISED FICTIONALIZED FLUIDEXTRACTS GALACTOSIDASE GEODYNAMICIST GILLRAVITCHED GONADECTOMIES GONADOTROPHIC GRAMMATICISED GRAMMATICIZED GRANODIORITIC HANDICRAFTERS HEMICHORDATES HEPTADECANOIC HEXACTINELLID HOMOSCEDASTIC HYDROMAGNETIC HYDROMETRICAL HYDROPATHICAL HYDROSTATICAL HYDROTHERAPIC HYDROTHORACIC HYDROXYACETIC HYPOACIDITIES ICHTHYOPSIDAN IDENTICALNESS IDEOGRAMMATIC IDIOMATICALLY IDIOMATICNESS IDIOPLASMATIC IDIOSYNCRATIC IDIOTICALNESS IMPREDICATIVE INADVERTENCES INCANDESCENTS INCAPACITATED INCARDINATING INCARDINATION INCONSIDERATE INDETERMINACY INDOCTRINATED INDOCTRINATES INDOCTRINATOR INDOMETHACINS INDUPLICATION INEDUCABILITY INEXACTITUDES INTERCOMPARED INTERPANDEMIC INTOXICATEDLY JUDGMATICALLY LEUCOPLASTIDS MACHAIRODONTS MACRODACTYLIC MALFUNCTIONED MASTOIDECTOMY MATCHBOARDING MEDICAMENTARY MEDICAMENTING MEDICAMENTOUS MEDIEVALISTIC MELODRAMATICS MISADVERTENCE MISCALCULATED MISCATALOGUED MISEDUCATIONS MISPUNCTUATED MITOCHONDRIAL MODIFICATIONS MULTIBRANCHED MULTIPLICANDS MUNDIFICATION MUNDIFICATIVE MYOCARDITISES NICOTINAMIDES NIDIFICATIONS NONACCIDENTAL NONACCREDITED NONASSOCIATED NONCANDIDATES NONCULTIVATED NONDEMOCRATIC NONDIPLOMATIC NONEDUCATIONS NONINDICTABLE NONINTERLACED NUCLEOTIDASES OCCIDENTALISE OCCIDENTALISM OCCIDENTALIST OCCIDENTALIZE ODONTOBLASTIC ODONTOLOGICAL ORTHOPAEDICAL OUTDISTANCING OUTRECUIDANCE OVERDRAMATICS OVEREDUCATING OVEREDUCATION OVERMEDICATED OVERMEDICATES PAEDIATRICIAN PANDICULATION PARASITICIDAL PARASITICIDES PARCHMENTISED PARCHMENTIZED PARTICLEBOARD PARTICOLOURED PEDANTICISING PEDANTICIZING PEDANTOCRATIC PEDIATRICIANS PEDICULATIONS PEDUNCULATION PENTACRINOIDS PENTADACTYLIC PEPTIDOGLYCAN PERIODICALIST PERISSODACTYL PHOTODYNAMICS PICTORIALISED PICTORIALIZED POLITICALISED POLITICALIZED POLYDACTYLIES POLYDACTYLISM PREACQUAINTED PREDICABILITY PREDICAMENTAL PREDICATIVELY PREFABRICATED PREJUDICATING PREJUDICATION PREJUDICATIVE PREMEDICATING PREMEDICATION PRESANCTIFIED PRIVATDOCENTS PROPAEDEUTICS QUADRATICALLY QUADRICIPITAL QUADRISECTING QUADRISECTION QUADRUPLICATE QUADRUPLICITY QUARTODECIMAN QUINDECAPLETS QUODLIBETICAL RADICULOPATHY RADIOACTIVATE RADIOACTIVELY RADIOACTIVITY RADIOCHEMISTS RADIOISOTOPIC RADIOLOCATION RADIOPACITIES REACCREDITING READMITTANCES REARTICULATED RECALCITRATED RECAPITALISED RECAPITALIZED RECAPITULATED RECATEGORIZED RECENTRALIZED RECONSOLIDATE REDECORATIONS REDEDICATIONS REDUPLICATING REDUPLICATION REDUPLICATIVE REVENDICATING REVENDICATION REVINDICATING REVINDICATION SACERDOTALISE SACERDOTALISM SACERDOTALIST SACERDOTALIZE SADOMASOCHIST SCRATCHBUILDS SCROBICULATED SECTARIANISED SECTARIANIZED SECTIONALISED SECTIONALIZED SEMIDETACHEDS SEXTUPLICATED SHADOWCASTING SODOMITICALLY SOPHISTICATED SOUNDTRACKING SPERMATOCIDAL SPERMATOCIDES STICKHANDLERS STICKHANDLING STRAIGHTLACED STRAITLACEDLY SUBDIACONATES SUBINDICATING SUBINDICATION SUBINDICATIVE SULFACETAMIDE SYCOPHANTISED SYCOPHANTIZED SYNDACTYLISMS SYNDICALISTIC TECHNICALISED TECHNICALIZED TETRACHLORIDE THERMODYNAMIC THIOCARBAMIDE TRADESCANTIAS TRADUCIANISMS TRADUCIANISTS TRAGICOMEDIES TRANSACTINIDE TRANSDUCTIONS TRANSLUCIDITY TRICHOMONADAL TRICORPORATED TRISACCHARIDE TRISOCTAHEDRA TROGLODYTICAL TURACOVERDINS ULTRADISTANCE ULTRARADICALS UNADJUDICATED UNANTICIPATED UNAPPRECIATED UNARTICULATED UNASCERTAINED UNCAPITALISED UNCAPITALIZED UNCHLORINATED UNCHRISTIANED UNCOMPLICATED UNCONDITIONAL UNCONSTRAINED UNCOORDINATED UNDEPRECIATED UNDERACTIVITY UNDERCOATINGS UNDERREACTING UNDERREACTION UNDIALECTICAL UNDISSOCIATED UNDISTRACTING UNDOCTRINAIRE UNDOMESTICATE UNPLASTICISED UNPLASTICIZED UNPREDICTABLE UNPREDICTABLY VACATIONLANDS VALEDICTORIAN VALEDICTORIES VERTICILLATED VIDEOCASSETTE VINDICABILITY VINDICATORILY WATCHDOGGINGS XANTHOCHROIDS ZANTEDESCHIAS ZYGODACTYLISM