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