There are 512 thirteen-letter words containing A, N, 2T and U, https://www.bestwordlist.com/c/a/5/13letterwordswithanttu.htm
ACCENTUATIONS ACCOUSTREMENT ACCOUTERMENTS ACCOUTREMENTS ACCULTURATING
ACCULTURATION ACCUSTOMATION ACCUSTREMENTS ACQUITTANCING ACTUALISATION
ACTUALIZATION ACUPUNCTURIST ADULTERATIONS ADVENTURISTIC AGGLUTINATING
AGGLUTINATION AGGLUTINATIVE ANDOUILLETTES ANFRACTUOSITY ANNUITISATION
ANNUITIZATION ANTEPENULTIMA ANTIAUTHORITY ANTICELLULITE ANTICOAGULANT
ANTICOMMUNIST ANTIDIURETICS ANTIEVOLUTION ANTIHUMANISTS ANTINAUSEANTS
ANTINEUTRINOS ANTIPOLLUTION ANTIPRURITICS ANTIQUITARIAN ANTIRHEUMATIC
ANTIRITUALISM ANTISCORBUTIC ANTISEXUALITY APTITUDINALLY ARGUMENTATION
ARGUMENTATIVE ARTICULATIONS ASTRONAUTICAL ASTROTURFINGS ATTITUDINALLY
ATTITUDINISED ATTITUDINISER ATTITUDINISES ATTITUDINIZED ATTITUDINIZER
ATTITUDINIZES ATTRIBUTIONAL AUGMENTATIONS AUGMENTATIVES AUSCULTATIONS
AUTHENTICALLY AUTHENTICATED AUTHENTICATES AUTHENTICATOR AUTHORISATION
AUTHORITARIAN AUTHORIZATION AUTOCHTHONIES AUTOCHTHONISM AUTOCHTHONOUS
AUTOINFECTION AUTOINJECTORS AUTOROTATIONS AUTOXIDATIONS AYUNTAMIENTOS
BATTLEGROUNDS BEQUEATHMENTS BIOTURBATIONS BLASTULATIONS BRUTALISATION
BRUTALIZATION CAPITULATIONS CATAMOUNTAINS CATECHUMENATE CAUSATIONISTS
CAUTERISATION CAUTERIZATION CENTUMVIRATES CENTUPLICATED CENTUPLICATES
CENTURIATIONS CIRCUMNUTATED CIRCUMNUTATES CLAUSTRATIONS CLEARCUTTINGS
COCULTIVATING COCULTIVATION COLLUCTATIONS COMPUTATIONAL CONCEPTUALIST
CONCEPTUALITY CONGLUTINATED CONGLUTINATES CONGLUTINATOR CONGRATULANTS
CONGRATULATED CONGRATULATES CONGRATULATOR CONNATURALITY CONSTRUCTABLE
CONSTUPRATING CONSTUPRATION CONSULTATIONS CONTEXTUALISE CONTEXTUALIZE
CONTINUATIONS CONTINUATIVES CONTRACTUALLY CONTRAPUNTIST CONTRIBUTABLE
CONTRITURATED CONTRITURATES CONTUMACITIES COSURFACTANTS COUNTERACTING
COUNTERACTION COUNTERACTIVE COUNTERAGENTS COUNTERATTACK COUNTERBLASTS
COUNTERSHAFTS COUNTERSTAINS COUNTERSTATED COUNTERSTATES COUNTERSTREAM
COUNTERTACTIC COUNTERTHREAT COUNTERTRADED COUNTERTRADES CUSTOMISATION
CUSTOMIZATION CUTINISATIONS CUTINIZATIONS DEATTRIBUTING DECRUSTATIONS
DEGLUTINATING DEGLUTINATION DENATURATIONS DENTICULATELY DENTICULATION
DEPUTISATIONS DEPUTIZATIONS DESATURATIONS DESTRUCTIONAL DETRUNCATIONS
DEUTERAGONIST DINOTURBATION DISQUANTITIED DISQUANTITIES DISREPUTATION
DOCUMENTALIST DOCUMENTARIST DOCUMENTATION EDUCATIONISTS EFFECTUATIONS
ENCRUSTATIONS ENCULTURATING ENCULTURATION ENCULTURATIVE EQUIDISTANTLY
EQUIPARTITION EQUIPOTENTIAL EUTHANASIASTS EUTHANATISING EUTHANATIZING
EVENTUALITIES EXANTHEMATOUS EXPOSTULATING EXPOSTULATION EXTENUATINGLY
EXTINGUISHANT FLUCTUATIONAL FORTUNATENESS FREQUENTATION FREQUENTATIVE
FRUMENTATIONS FRUSTRATINGLY FUNCTIONALIST FUNCTIONALITY FUNCTIONATING
FUTILITARIANS GASTRULATIONS GESTICULATING GESTICULATION GRATICULATION
GUESSTIMATING GUTTURALISING GUTTURALIZING HYSTERANTHOUS ILLUSTRATIONS
IMPORTUNATELY IMPOSTUMATING IMPOSTUMATION INARTICULATES INCRUSTATIONS
INDUSTRIALIST INEXACTITUDES INGURGITATING INGURGITATION INSTANTANEOUS
INSTAURATIONS INSTINCTUALLY INSTITUTIONAL INSTRUCTIONAL INSTRUMENTALS
INSUBSTANTIAL INTEGUMENTARY INTELLECTUALS INTERCULTURAL INTERJACULATE
INTERJECTURAL INTERLUNATION INTERMOUNTAIN INTEROSCULANT INTEROSCULATE
INTERQUARTILE INTRATELLURIC INTUITIONALLY INTURBIDATING INVULTUATIONS
JUSTIFICATION JUXTAPOSITION LATITUDINALLY LUTEINISATION LUTEINIZATION
MACROMUTATION MACRONUTRIENT MALADJUSTMENT MALNUTRITIONS MASTURBATIONS
MATRICULATING MATRICULATION MENSTRUATIONS METACOMPUTING MINIATURISTIC
MISADJUSTMENT MISPUNCTUATED MISPUNCTUATES MISQUOTATIONS MONOSATURATED
MONOTREMATOUS MONUMENTALITY MOUTHWATERING MULTIFILAMENT MULTILOCATION
MULTIMEGATONS MULTINATIONAL MULTINUCLEATE MULTIPLATINUM MULTISTANDARD
MULTISTRANDED MULTITALENTED MULTITASKINGS MULTITERMINAL MULTITRACKING
MULTITUDINARY MULTIVITAMINS MULTUNGULATES MUTUALISATION MUTUALIZATION
NANOSTRUCTURE NATUROPATHIES NEUROPATHISTS NOCTAMBULISTS NONAUTOMOTIVE
NONCULTIVATED NONSTRUCTURAL NOTOUNGULATES NUTRACEUTICAL NUTRICEUTICAL
NUTRITIONALLY OBSCURANTISTS OBSTRUCTIONAL ORTHOGNATHOUS OUTDISTANCING
OUTMANIPULATE OUTPLACEMENTS OUTPOPULATING OUTSTANDINGLY OUTTRAVELLING
PENTASTICHOUS PENULTIMATELY PERLUSTRATING PERLUSTRATION PERMUTATIONAL
PERPETUATIONS PERSCRUTATION PERTURBATIONS PICTURISATION PICTURIZATION
PLATITUDINISE PLATITUDINIZE PLATITUDINOUS PNEUMATOLYTIC PNEUMATOMETER
PNEUMATOMETRY POCOCURANTIST POSTDEBUTANTE POSTMENSTRUAL POSTULANTSHIP
POSTULATIONAL PREGUSTATIONS PRETERNATURAL PRETOURNAMENT PROTACTINIUMS
PROTOACTINIUM PROTUBERANTLY PROTUBERATING PROTUBERATION PRUDENTIALIST
PRUDENTIALITY PUNCTUALITIES PUNCTULATIONS PUNCTURATIONS PUTANGITANGIS
PUTREFACTIONS PUTRIFICATION QUANTISATIONS QUANTITATIONS QUANTIZATIONS
QUATERNIONIST QUATTROCENTOS QUINTUPLICATE READJUSTMENTS REATTRIBUTING
REATTRIBUTION RECOMPUTATION RECULTIVATING RECULTIVATION REGURGITATING
REGURGITATION RENATURATIONS REPUNCTUATING REPUNCTUATION RESTAURANTEUR
RESTAURATIONS RESTIMULATING RESTIMULATION RESUSCITATING RESUSCITATION
RETICULATIONS RETURNABILITY REUTILISATION REUTILIZATION RITUALISATION
RITUALIZATION ROUTINISATION ROUTINIZATION SALUTATORIANS SANSCULOTTISH
SANSCULOTTISM SANSCULOTTIST SATURNINITIES SCUTELLATIONS SEQUENTIALITY
SEQUESTRATING SEQUESTRATION SITUATIONALLY SITUATIONISMS SPLATTERPUNKS
SQUATTINESSES STENOPETALOUS STERNUTATIONS STERNUTATIVES STIMULATINGLY
STRANGULATING STRANGULATION STRIDULATIONS STRUCTURATION STUPEFACIENTS
STUPEFACTIONS SUBALTERNANTS SUBALTERNATES SUBCONTRACTED SUBCONTRACTOR
SUBDEBUTANTES SUBDEPARTMENT SUBHASTATIONS SUBLIEUTENANT SUBSATURATION
SUBSISTENTIAL SUBSTANTIALLY SUBSTANTIATED SUBSTANTIATES SUBSTANTIATOR
SUBSTANTIVELY SUBSTANTIVISE SUBSTANTIVITY SUBSTANTIVIZE SUBSTRACTIONS
SUBTERNATURAL SUBTILISATION SUBTILIZATION SUPERFETATING SUPERFETATION
SUPERMILITANT SUPERNATATION SUPERSTATIONS SUPPLANTATION SUSTENTACULAR
SUSTENTACULUM SUSTENTATIONS TACITURNITIES TACTFULNESSES TAMBOURINISTS
TAUTOCHRONISM TAUTOCHRONOUS TAUTOLOGISING TAUTOLOGIZING TAUTOPHONICAL
TETRADYNAMOUS THURIFICATION TINTINNABULAR TINTINNABULUM TRADUCIANISTS
TRANQUILITIES TRANSCULTURAL TRANSDUCTANTS TRANSDUCTIONS TRANSEXUALITY
TRANSLUCENTLY TRANSLUCIDITY TRANSMOUNTAIN TRANSMUTATION TRANSMUTATIVE
TRANSUDATIONS TRANSUMPTIONS TRANSURETHRAL TRANSVALUATED TRANSVALUATES
TRAUMATONASTY TREPONEMATOUS TRIANGULARITY TRIANGULATELY TRIANGULATING
TRIANGULATION TRIBUTARINESS TRIFURCATIONS TRIPUDIATIONS TRUSTAFARIANS
TUBERCULATION TUMULTUATIONS ULTRADISTANCE ULTRAMARATHON ULTRAMILITANT
ULTRAMONTANES ULTRANATIONAL ULTRARATIONAL ULTRAROMANTIC UNACCENTUATED
UNADULTERATED UNANTICIPATED UNARTICULATED UNATHLETICISM UNCERTAINTIES
UNCONSTRAINTS UNCONTESTABLE UNDERACTIVITY UNDERESTIMATE UNDERSTATEDLY
UNDERSTRATUMS UNDERTREATING UNDETERMINATE UNDISTRACTING UNDOMESTICATE
UNDULATIONIST UNENTERTAINED UNFATHERLIEST UNFORGETTABLE UNFORGETTABLY
UNFORTUNATELY UNILATERALIST UNILATERALITY UNILLUSTRATED UNIMPORTANTLY
UNINTENTIONAL UNINTIMIDATED UNMITIGATEDLY UNPERPETRATED UNPUNCTUALITY
UNREPENTANTLY UNSATURATIONS UNSENTIMENTAL UNSTARTLINGLY UNSTEADFASTLY
UNSTERCORATED UNSTIGMATISED UNSTIGMATIZED UNSUBSTANTIAL UNSUITABILITY
UNSYMPATHETIC UNTACTFULNESS UNTAINTEDNESS UNTERRESTRIAL UNTHEORETICAL
UNTHREATENING UNTHRIFTIHEAD UNTHRIFTYHEAD UNTRADITIONAL UNTRANSMITTED
UNTRANSPARENT URALITISATION URALITIZATION UTTERABLENESS VITUPERATIONS
VOLUNTARISTIC VOLUNTARYISTS