There are 565 fourteen-letter words containing A, C, S, T and U, https://www.bestwordlist.com/c/a/5/14letterwordswithacstu.htm ACCENTUALITIES ACCOUNTANTSHIP ACCOUSTREMENTS ACCULTURATIONS ACCURATENESSES ACCUSTOMATIONS ACCUSTOMEDNESS ACTINOBACILLUS ACTINOMORPHOUS ACTINOMYCETOUS ACTINOURANIUMS ACTUALISATIONS ACTUALIZATIONS ACUPUNCTURINGS ACUPUNCTURISTS ADSCITITIOUSLY AERENCHYMATOUS AEROSTRUCTURES AGRICULTURISTS ALTRUISTICALLY AMARANTHACEOUS ANISODACTYLOUS ANTICOAGULANTS ANTICOMMUNISMS ANTICOMMUNISTS ANTICONVULSANT ANTICONVULSIVE ANTIHUMANISTIC ANTINUCLEARIST ANTIRHEUMATICS ANTISCORBUTICS ANTISCRIPTURAL AQUACULTURISTS AQUICULTURISTS ARBORICULTURES ARTICULATENESS ARTIODACTYLOUS AUDIOCASSETTES AUTHENTICATORS AUTHENTICITIES AUTOCATALYSING AUTOCHTHONISMS AUTODESTRUCTED AUTOEROTICISMS AUTOINFECTIONS AUTOMATICITIES AUTOSCHEDIASMS AUTOSCHEDIAZED AUTOSCHEDIAZES AVASCULARITIES AVERRUNCATIONS AVUNCULARITIES BACCALAUREATES BEHAVIOURISTIC BICULTURALISMS BINOCULARITIES BIOACCUMULATES BIOACOUSTICIAN BIOAERONAUTICS BUREAUCRATESES BUREAUCRATISED BUREAUCRATISES BUREAUCRATISMS BUREAUCRATISTS BUREAUCRATIZES CALAMITOUSNESS CALCULATEDNESS CAMPYLOTROPOUS CANTANKEROUSLY CAPTIOUSNESSES CARBURISATIONS CARBURIZATIONS CASUALISATIONS CASUALIZATIONS CATECHUMENATES CATECHUMENISMS CATECHUMENSHIP CAULIFLOWERETS CAUTERISATIONS CAUTERIZATIONS CAUTIOUSNESSES CENTRIFUGALISE CHATEAUBRIANDS CHEMAUTOTROPHS CHIAROSCURISTS CHRYSANTHEMUMS CHURCHIANITIES CHURCHMANLIEST CIRCUMSTANCING CIRCUMSTANTIAL CIRCUMVALLATES CLAUSTROPHILIA CLAUSTROPHOBES CLAUSTROPHOBIA CLAUSTROPHOBIC CLUBBABILITIES COADJUTORSHIPS COASTGUARDSMAN COASTGUARDSMEN COCULTIVATIONS COETANEOUSNESS COLLOQUIALISTS COLOURFASTNESS COLOURISATIONS COLOURIZATIONS COMMENSURATELY COMMENSURATION COMMUNAUTAIRES COMMUNICATIONS COMMUNISATIONS COMMUNITARIANS COMMUNIZATIONS COMMUTABLENESS COMPUTERISABLE CONCEPTUALISED CONCEPTUALISER CONCEPTUALISES CONCEPTUALISMS CONCEPTUALISTS CONCEPTUALIZES CONCUBITANCIES CONFABULATIONS CONFIGURATIONS CONGLUTINATORS CONGRATULATORS CONNATURALISED CONNATURALISES CONNATURALIZES CONNATURALNESS CONNUBIALITIES CONNUMERATIONS CONQUISTADORES CONSERVATORIUM CONSPURCATIONS CONSTABULARIES CONSTITUTIONAL CONSTRUABILITY CONSTRUCTIONAL CONSTUPRATIONS CONSUBSTANTIAL CONSUETUDINARY CONSULTANTSHIP CONSULTATIVELY CONTAGIOUSNESS CONTEXTUALISED CONTEXTUALISES CONTEXTUALIZES CONTINUALITIES CONTRADICTIOUS CONTRAPUNTISTS CONTRIBUTARIES CONTUMACIOUSLY CORPUSCULARITY COSMECEUTICALS COTEMPORANEOUS COTRANSDUCTION COUNTABILITIES COUNTERACTIONS COUNTERASSAULT COUNTERATTACKS COUNTERCHANGES COUNTERCHARGES COUNTERDEMANDS COUNTERMARCHES COUNTERMEASURE COUNTERPARTIES COUNTERPLAYERS COUNTERRALLIES COUNTERSEALING COUNTERSHADING COUNTERSTAINED COUNTERSTATING COUNTERSTREAMS COUNTERTACTICS COUNTERTHREATS CREATURELINESS CRUCIVERBALIST CRUSHABILITIES CUCURBITACEOUS CUMULATIVENESS CURATIVENESSES CURIETHERAPIES CUSTODIANSHIPS CUSTOMISATIONS CUSTOMIZATIONS CYBERSQUATTERS CYBERSQUATTING CYCLANTHACEOUS CYCLOSTOMATOUS DECAMETHONIUMS DECAPSULATIONS DECARBURATIONS DEDUPLICATIONS DENTICULATIONS DIPTEROCARPOUS DISACCUSTOMING DISARTICULATED DISARTICULATES DISARTICULATOR DISCOLOURATION DISCOMBOBULATE DISCONTINUANCE DISCOUNTENANCE DISCOURAGEMENT DIURETICALNESS DOCUMENTALISTS DOCUMENTARIANS DOCUMENTARISED DOCUMENTARISES DOCUMENTARISTS DOCUMENTARIZES DOCUMENTATIONS DULCIFICATIONS EDUCATEDNESSES EDUCATIONALIST EFFECTUALITIES EMULSIFICATION ENCAPSULATIONS ENCOURAGEMENTS ENCULTURATIONS ENTHUSIASTICAL ENTOMOSTRACOUS EQUIVOCALITIES EUDEMONISTICAL EULOGISTICALLY EUPHUISTICALLY EXCLAUSTRATION EXCOMMUNICATES FACTIOUSNESSES FACTITIOUSNESS FASCICULATIONS FLUOROACETATES FUNCTIONALISMS FUNCTIONALISTS FUTURISTICALLY GALACTOPHOROUS GASTROVASCULAR GESTICULATIONS GRATICULATIONS HALLUCINATIONS HARUSPICATIONS HUMANISTICALLY HYDROACOUSTICS HYPERACUTENESS ICHTHYOLATROUS ICHTHYOPHAGOUS ICHTHYOSAURIAN IMMACULATENESS INACCURATENESS INARTICULACIES INCAPSULATIONS INCAUTIOUSNESS INCOMMENSURATE INCURABILITIES INDUPLICATIONS INEXCUSABILITY INFRASTRUCTURE INSCRUTABILITY INSURRECTIONAL INTERJACULATES INTEROSCULATED INTEROSCULATES INTRACUTANEOUS IRRESUSCITABLE IRRESUSCITABLY JURISDICTIONAL JUSTICIABILITY JUSTICIARSHIPS JUSTIFICATIONS LACTOGLOBULINS LAUGHINGSTOCKS LECYTHIDACEOUS LEPTOCEPHALOUS LEPTODACTYLOUS LINGUISTICALLY LINGUISTICIANS MACRODACTYLOUS MACROMUTATIONS MACRONUTRIENTS MACROSTRUCTURE MALACOSTRACOUS MANUFACTURINGS MARICULTURISTS MATRICULATIONS MEGASTRUCTURES MELASTOMACEOUS MERCURIALITIES MESENCHYMATOUS METACOMPUTINGS METALINGUISTIC MICROPULSATION MICROSTOMATOUS MISARTICULATED MISARTICULATES MISCALCULATING MISCALCULATION MISCALCULATORS MISCATALOGUING MISCOMPUTATION MISPUNCTUATING MISPUNCTUATION MOCKUMENTARIES MOLECULARITIES MULTICUSPIDATE MULTILOCATIONS MULTIPARTICLES MULTIPLICATORS MULTIRACIALISM MULTIVALENCIES MUMMIFICATIONS MUNDIFICATIONS MUNDIFICATIVES MUNICIPALITIES MUSICALISATION MUSICALIZATION MUTAGENICITIES NANOSTRUCTURED NANOSTRUCTURES NECTAREOUSNESS NEURASTHENIACS NOCTURNALITIES NONACQUISITIVE NONCHAUVINISTS NONJUSTICIABLE NONSPECTACULAR NONSPECULATIVE NUCLEARISATION NULLIFICATIONS NUMISMATICALLY NUTRACEUTICALS NUTRICEUTICALS NYCTAGINACEOUS ORBICULARITIES ORTHOCEPHALOUS OUTRECUIDANCES OVERCAUTIOUSLY OVEREDUCATIONS OVERSPECULATED OVERSPECULATES OXIDOREDUCTASE PACHYDACTYLOUS PACHYDERMATOUS PALAEOCURRENTS PANDICULATIONS PARALINGUISTIC PARENCHYMATOUS PARTICULARISED PARTICULARISER PARTICULARISES PARTICULARISMS PARTICULARISTS PARTICULARIZES PARTICULARNESS PEDUNCULATIONS PENNATULACEOUS PENTADACTYLOUS PERCUTANEOUSLY PERSCRUTATIONS PERTINACIOUSLY PHARMACEUTISTS PICTURISATIONS PICTURIZATIONS PLATYCEPHALOUS PLECTOGNATHOUS PNEUMATICITIES PNEUMOGASTRICS PNEUMOTHORACES POCOCURANTEISM POCOCURANTISMS POCOCURANTISTS PORTULACACEOUS POSTCOPULATORY POSTSURGICALLY PREACQUISITION PREJUDICATIONS PREOCCUPATIONS PROCELEUSMATIC PROCURATORSHIP PRONUCLEARISTS PRONUNCIATIONS PROTOACTINIUMS PROTUBERANCIES PSYCHOACOUSTIC PUGILISTICALLY PUNCTUATIONIST PUNDITOCRACIES PURCHASABILITY PUTRIFICATIONS QUADRISECTIONS QUADRUPLICATES QUALIFICATIONS QUALIFICATIVES QUANTIVALENCES QUARTERDECKERS QUARTODECIMANS QUASIPARTICLES QUATTROCENTISM QUATTROCENTIST QUINQUECOSTATE QUINTUPLICATES QUIZZICALITIES RAMBUNCTIOUSLY REACQUISITIONS RECALCULATIONS RECIRCULATIONS RECOMPUTATIONS RECULTIVATIONS RECURVIROSTRAL REDISCOUNTABLE REDUPLICATIONS REINOCULATIONS RELUBRICATIONS REMANUFACTURES REPUBLICATIONS REPUNCTUATIONS RESURRECTIONAL RESUSCITATIONS REUNIFICATIONS SANGUIFICATION SANSCULOTTERIE SANSCULOTTIDES SANSCULOTTISMS SANSCULOTTISTS SCATTERMOUCHES SCHIZOGNATHOUS SCRATCHBUILDER SCRIPTURALISMS SCRIPTURALISTS SCRUTABILITIES SECULARISATION SECULARIZATION SECURITISATION SECURITIZATION SEMIAUTOMATICS SEXTUPLICATING SLANTENDICULAR SLANTINDICULAR SOMNAMBULISTIC SPECTACULARITY SPIRITUALISTIC SQUATTOCRACIES STAPHYLOCOCCUS STEGOCEPHALOUS STERCULIACEOUS STEREOACUITIES STOMACHFULNESS STRATICULATION STRUCTURALISED STRUCTURALISES STRUCTURALISMS STRUCTURALISTS STRUCTURALIZED STRUCTURALIZES STRUCTURATIONS STULTIFICATION SUBADOLESCENTS SUBALLOCATIONS SUBARBORESCENT SUBASSOCIATION SUBATMOSPHERIC SUBCATEGORISED SUBCATEGORISES SUBCATEGORIZED SUBCATEGORIZES SUBCONTINENTAL SUBCONTRACTING SUBCONTRACTORS SUBCONTRARIETY SUBCUTANEOUSLY SUBINDICATIONS SUBJECTABILITY SUBLIEUTENANCY SUBMETACENTRIC SUBSECRETARIES SUBSPECIALISTS SUBSPECIALTIES SUBTHERAPEUTIC SULFACETAMIDES SULPHACETAMIDE SUPERCELESTIAL SUPERFICIALITY SUPERPARTICLES SUPERPATRIOTIC SUPERSPECTACLE SUPPLICATINGLY SURCHARGEMENTS SUSPERCOLLATED SUSPERCOLLATES TAUTOCHRONISMS TETRACHOTOMOUS TETRADACTYLOUS THOROUGHBRACES THURIFICATIONS THYMELAEACEOUS TRACHYPTERUSES TRADUCIANISTIC TRANSCAUCASIAN TRANSCUTANEOUS TRANSDUCTIONAL TRANSLUCENCIES TRANSPICUOUSLY TUBERCULATIONS TURBOCHARGINGS ULTRACIVILISED ULTRAEXCLUSIVE ULTRAMASCULINE ULTRAPRECISION ULTRAREALISTIC ULTRAROMANTICS ULTRASONICALLY ULTRASTRUCTURE ULTRAVIOLENCES UNACCLIMATISED UNACCUSTOMEDLY UNAFFECTEDNESS UNATHLETICISMS UNCHASTENESSES UNCHAUVINISTIC UNCHRISTIANING UNCHRISTIANISE UNCHRISTIANIZE UNCOLLECTABLES UNCONSECRATING UNCONSOLIDATED UNCRYSTALLISED UNCRYSTALLIZED UNDERREACTIONS UNDERSECRETARY UNDERTENANCIES UNDISTRACTEDLY UNDOCTRINAIRES UNDOMESTICATED UNDOMESTICATES UNENTHUSIASTIC UNHISTORICALLY UNHYSTERICALLY UNICAMERALISTS UNIVERSALISTIC UNMETAPHYSICAL UNPOETICALNESS UNPREDICTABLES UNRESPECTABLES UNROMANTICISED UNSATISFACTION UNSATISFACTORY UNSCRIPTURALLY UNSECTARIANISM UNSOPHISTICATE UNSYSTEMATICAL UNWATCHFULNESS URBANISTICALLY USUFRUCTUARIES VACUOLISATIONS VACUOLIZATIONS VERMICULATIONS VERNACULARISTS VESICULARITIES VOUCHSAFEMENTS VULCANISATIONS VULCANIZATIONS VULCANOLOGISTS WATCHFULNESSES WATERCOLOURIST WELTANSCHAUUNG YUPPIFICATIONS