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