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