There are 488 thirteen-letter words containing 2A, N, T and U, https://www.bestwordlist.com/c/a/5/13letterwordswithaantu.htm ACCENTUATIONS ACCOUNTANCIES ACCULTURATING ACCULTURATION ACCUMULATIONS ACCUSTOMATION ACQUAINTANCES ACQUISITIONAL ACQUITTANCING ACTINOURANIUM ACTUALISATION ACTUALIZATION ADJUDICATIONS ADMEASUREMENT ADMINICULATED ADMINICULATES ADULTERATIONS AGGLUTINATING AGGLUTINATION AGGLUTINATIVE AGRANULOCYTES AMARANTACEOUS ANFRACTUOSITY ANIMALCULISTS ANNUITISATION ANNUITIZATION ANNUNCIATIONS ANTEDILUVIANS ANTEPENULTIMA ANTHRAQUINONE ANTIAUTHORITY ANTICOAGULANT ANTIGUERRILLA ANTIHUMANISMS ANTIHUMANISTS ANTIMARIJUANA ANTINAUSEANTS ANTIQUITARIAN ANTIRHEUMATIC ANTIRITUALISM ANTISEXUALITY ANTISUBMARINE APHANIPTEROUS APPENDICULATE APPROPINQUATE APPURTENANCES APTITUDINALLY AQUAFITNESSES ARGUMENTATION ARGUMENTATIVE ARMAMENTARIUM ARTICULATIONS ASSUBJUGATING ASSUEFACTIONS ASTRONAUTICAL ATTITUDINALLY ATTRIBUTIONAL AUGMENTATIONS AUGMENTATIVES AUREATENESSES AUSCULTATIONS AUTHENTICALLY AUTHENTICATED AUTHENTICATES AUTHENTICATOR AUTHORISATION AUTHORITARIAN AUTHORIZATION AUTONOMICALLY AUTOROTATIONS AUTOXIDATIONS AVERRUNCATING AVERRUNCATION AVERRUNCATORS AYUNTAMIENTOS BEAUMONTAGUES BLACKCURRANTS BLASTULATIONS BRUTALISATION BRUTALIZATION CALCULATINGLY CALCULATIONAL CALLITHUMPIAN CALUMNIATIONS CALYCANTHUSES CANALICULATED CAPITULATIONS CARBURISATION CARBURIZATION CARCINOMATOUS CARTILAGINOUS CASUALISATION CASUALIZATION CATALOGUISING CATALOGUIZING CATAMOUNTAINS CATECHUMENATE CATERWAULINGS CAUSATIONISMS CAUSATIONISTS CAUSATIVENESS CAUTERISATION CAUTERIZATION CHATEAUBRIAND CLAIRAUDIENTS CLAUDICATIONS CLAUSTRATIONS COASTGUARDMAN COASTGUARDMEN COEDUCATIONAL COMMUNAUTAIRE COMMUNITARIAN COMPUTATIONAL CONFABULATING CONFABULATION CONFABULATORS CONFABULATORY CONGRATULABLE CONGRATULANTS CONGRATULATED CONGRATULATES CONGRATULATOR CONJUGATIONAL CONNATURALISE CONNATURALITY CONNATURALIZE CONTRACTUALLY CONTRASEXUALS COSURFACTANTS COUNTERATTACK CURARISATIONS CURARIZATIONS DECAPSULATING DECAPSULATION DECARBURATION DEFRAUDATIONS DEGRANULATION DENATURALISED DENATURALISES DENATURALIZED DENATURALIZES DENATURATIONS DEPAUPERATING DESATURATIONS DESQUAMATIONS DEUTERANOMALY DEUTERANOPIAS DIATHERMANOUS DISNATURALISE DISNATURALIZE DOCUMENTARIAN DRAUGHTSWOMAN EDUCATIONALLY EMASCULATIONS ENCAPSULATING ENCAPSULATION ENCAUSTICALLY ENSANGUINATED EQUALISATIONS EQUALITARIANS EQUALIZATIONS EQUIPARATIONS EUSPORANGIATE EUTHANASIASTS EUTHANATISING EUTHANATIZING EXANTHEMATOUS EXSANGUINATED EXSANGUINATES FACTUALNESSES FASCICULATION FAUNISTICALLY FEUDALISATION FEUDALIZATION FLAMMULATIONS FLUCTUATIONAL FLUNITRAZEPAM FOUNDATIONARY FOUNTAINHEADS FRUITARIANISM FUNAMBULATING FUNAMBULATION FUNAMBULATORS FUNAMBULATORY FUNDAMENTALLY FUTILITARIANS GASTRULATIONS GENTIANACEOUS GRANDDAUGHTER GRANULARITIES GRANULOMATOUS GRATICULATION GUBERNATORIAL HAEMATOGENOUS HALLUCINATING HALLUCINATION HALLUCINATIVE HALLUCINATORS HALLUCINATORY HARUSPICATING HARUSPICATION HERPETOFAUNAE HERPETOFAUNAS HUMANISATIONS HUMANITARIANS HUMANIZATIONS ICHTHYOFAUNAE ICHTHYOFAUNAL ICHTHYOFAUNAS ILLAQUEATIONS INARTICULATES INAUGURATIONS INCAPSULATING INCAPSULATION INHALATORIUMS INSTANTANEOUS INSTAURATIONS INSUBSTANTIAL INTERGRANULAR INTERJACULATE INTERSCAPULAR INTRACAPSULAR INTRACELLULAR INTRAMUSCULAR INTRAOCULARLY INTRAVASCULAR LATITUDINALLY LUBRICATIONAL MACROMUTATION MAGNETOPAUSES MALADJUSTMENT MANIPULATABLE MANIPULATIONS MANIPULATIVES MANSLAUGHTERS MANUFACTORIES MANUFACTURERS MANUFACTURING MASTURBATIONS MATRICULATING MATRICULATION MENSURATIONAL METALANGUAGES METHAQUALONES MISEVALUATING MISEVALUATION MONOSATURATED MONOTHALAMOUS MOUNTAINBOARD MULTINATIONAL MULTISTANDARD MUTAGENICALLY MUTUALISATION MUTUALIZATION NATURALNESSES NATUROPATHIES NEURASTHENIAC NEURASTHENIAS NEUROANATOMIC NEUROBLASTOMA NEUROPATHICAL NOMENCLATURAL NOMENKLATURAS NONEVALUATIVE NUTRACEUTICAL OUTBARGAINING OUTMANIPULATE OVERVALUATION PALAEOCURRENT PALUDAMENTUMS PANDICULATION PANSEXUALISTS PARAMENSTRUUM PARAMOUNTCIES PAUPERISATION PAUPERIZATION PERAMBULATING PERAMBULATION PERMUTATIONAL PHONAUTOGRAPH PLURALISATION PLURALIZATION PNEUMATICALLY POSTINAUGURAL POSTULATIONAL PREACQUAINTED PREAMBULATING PRECAUTIONARY PRETERNATURAL PROTANOMALOUS PROTOLANGUAGE PTEROSAURIANS PURITANICALLY PUTANGITANGIS QUADRIVALENTS QUALIFICATION QUANTISATIONS QUANTITATIONS QUANTIVALENCE QUANTIZATIONS QUARTERFINALS QUARTERSAWING QUARTODECIMAN REACQUAINTING RECALCULATING RECALCULATION RECATALOGUING RECTANGULARLY REEVALUATIONS REMANUFACTURE RENATURATIONS RESTAURANTEUR RESTAURATIONS RITUALISATION RITUALIZATION RURALISATIONS RURALIZATIONS SALUTATORIANS SANCTUARISING SANCTUARIZING SARMENTACEOUS SATURNALIANLY SAUROGNATHOUS SCAPULIMANTIC SCAPULOMANTIC SEXUALISATION SEXUALIZATION SITUATIONALLY SOMNAMBULANTS SOMNAMBULATED SOMNAMBULATES SOMNAMBULATOR STEGOSAURIANS STRANGULATING STRANGULATION SUBALLOCATING SUBALLOCATION SUBALTERNANTS SUBALTERNATES SUBARCUATIONS SUBARRHATIONS SUBDEACONATES SUBDIACONATES SUBHASTATIONS SUBLANCEOLATE SUBSATURATION SUBSTANTIALLY SUBSTANTIATED SUBSTANTIATES SUBSTANTIATOR SUBTERNATURAL SUBTERRANEANS SUBTRIANGULAR SUMMARISATION SUMMARIZATION SUPERABUNDANT SUPERANNUATED SUPERANNUATES SUPERNATATION SUPERNATIONAL SUPERNATURALS SUPPLANTATION SUPRANATIONAL SUPRARATIONAL SUSTENTACULAR TAUTOPHONICAL TELEOSAURIANS TETRADYNAMOUS TINTINNABULAR TRADUCIANISMS TRADUCIANISTS TRANSCULTURAL TRANSDUCTANTS TRANSEXUALISM TRANSEXUALITY TRANSFUSIONAL TRANSHUMANCES TRANSMOUNTAIN TRANSMUTATION TRANSMUTATIVE TRANSUDATIONS TRANSURETHRAL TRANSVALUATED TRANSVALUATES TRAUMATONASTY TRIANGULARITY TRIANGULATELY TRIANGULATING TRIANGULATION TRUSTAFARIANS TURANGAWAEWAE TURBELLARIANS TYRANNOSAURID TYRANNOSAURUS UBIQUITARIANS ULTRADISTANCE ULTRAMARATHON ULTRAMILITANT ULTRAMONTANES ULTRANATIONAL ULTRARATIONAL ULTRAROMANTIC ULTRAWIDEBAND UNABBREVIATED UNACCENTUATED UNACCEPTANCES UNACCOUNTABLE UNACCOUNTABLY UNACQUAINTING UNADJUDICATED UNADULTERATED UNANTICIPATED UNAPOSTOLICAL UNAPPRECIATED UNAPPROPRIATE UNARTICULATED UNASCERTAINED UNASSIMILATED UNCALCULATING UNCAPITALISED UNCAPITALIZED UNCHARISMATIC UNCHASTISABLE UNCHASTIZABLE UNCOMPLAISANT UNCONTAINABLE UNDERGRADUATE UNDIALECTICAL UNEATABLENESS UNEXAGGERATED UNFAMILIARITY UNGRAMMATICAL UNICAMERALIST UNILATERALISM UNILATERALIST UNILATERALITY UNIMAGINATIVE UNINAUGURATED UNINHABITABLE UNIPARENTALLY UNITARIANISMS UNMANIPULATED UNMISTAKEABLE UNMISTAKEABLY UNNATURALISED UNNATURALISES UNNATURALIZED UNNATURALIZES UNNATURALNESS UNPARASITISED UNPARASITIZED UNPRACTICABLE UNPRACTICALLY UNREADABILITY UNSALEABILITY UNSATISFIABLE UNSATURATIONS UNSENSATIONAL UNSPECTACULAR UNSTAUNCHABLE UNSTEADFASTLY UNSUBSTANTIAL UNSUSTAINABLE UNSUSTAINABLY UNTAMABLENESS UNTRADITIONAL UNTRANSPARENT UNTRAVERSABLE UNWARRANTABLE UNWARRANTABLY UNWARRANTEDLY URALITISATION URALITIZATION URANOGRAPHIST URANOPLASTIES URBANISATIONS URBANIZATIONS VACUOLISATION VACUOLIZATION VALUATIONALLY VERNACULARIST VERNACULARITY VISUALISATION VISUALIZATION VULCANISATION VULCANIZATION VULGARISATION VULGARIZATION