There are 559 eleven-letter words containing A, C, O, T and U, https://www.bestwordlist.com/c/a/5/11letterwordswithacotu.htm ABJUNCTIONS ACCLIVITOUS ACCOUNTABLE ACCOUNTABLY ACCOUNTANCY ACCOUNTANTS ACCOUNTINGS ACCOUTERING ACCUBATIONS ACCUMULATOR ACCUSATIONS ACCUSTOMARY ACCUSTOMING ACETONURIAS ACHROMATOUS ACIDULATION ACOLOUTHITE ACOUSTICIAN ACQUISITION ACQUISITORS ACUMINATION ADJUDICATOR ADJUNCTIONS AERONAUTICS AGRIPRODUCT ALLOCUTIONS ALTOCUMULUS AMENTACEOUS ANACOLUTHIA ANACOLUTHIC ANACOLUTHON ANFRACTUOUS ANNUNCIATOR ANTINUCLEON APOLAUSTICS APONEUROTIC ARTICULATOR ASCITITIOUS ASTRONAUTIC ASTUCIOUSLY ATROCIOUSLY AUCTIONEERS AUDIOMETRIC AUSCULTATOR AUTECOLOGIC AUTHORCRAFT AUTOCEPHALY AUTOCHANGER AUTOCHTHONS AUTOCHTHONY AUTOCLAVING AUTOCORRECT AUTOCRACIES AUTOCROSSES AUTODIDACTS AUTOFOCUSES AUTOGENETIC AUTOGRAPHIC AUTOKINETIC AUTOMATICAL AUTOMORPHIC AUTONOMICAL AUTOPLASTIC AUTOSCOPIES AUTOTROPHIC AUXOTROPHIC AVOUCHMENTS BACKCOUNTRY BARRACOUTAS BETULACEOUS BIFURCATION BUCCINATORS BUCCINATORY BUCKETLOADS BUTYRACEOUS CAFETORIUMS CALCULATION CALCULATORS CALUMNIATOR CANNULATION CANTALOUPES CANULATIONS CAOUTCHOUCS CAPITULATOR CAPSULATION CARBURATION CARBURETION CARBURETORS CARBURETTOR CARNAPTIOUS CATADROMOUS CATALOGUERS CATALOGUING CATALOGUISE CATALOGUIST CATALOGUIZE CATARACTOUS CAUSATIONAL CAUTIONRIES CEANOTHUSES CENTURIATOR CERATODUSES CETEOSAURUS CHAMPERTOUS CHARTACEOUS CHARTHOUSES CIGUATOXINS CIRCULATION CIRCULATORS CIRCULATORY COADJUTANTS COADJUTRESS COADUNATING COADUNATION COADUNATIVE COAGULATING COAGULATION COAGULATIVE COAGULATORS COAGULATORY COASTGUARDS COATIMUNDIS COAUTHORING COCULTIVATE COEDUCATION COFEATURING COLATITUDES COLLARSTUDS COLLIQUATED COLLIQUATES COLORATURAS COLORATURES COLOURATION COLOURCASTS COLUMNARITY COLUMNIATED COMITATUSES COMMUNALIST COMMUNALITY COMMUNICANT COMMUNICATE COMMUTATING COMMUTATION COMMUTATIVE COMMUTATORS COMPACTURES COMPURGATOR COMPUTATION COMPUTATIVE COMPUTATORS COMPUTERATE CONCUBITANT CONDUCTANCE CONFABULATE CONFIGURATE CONFLICTUAL CONFUTATION CONFUTATIVE CONJECTURAL CONJUGALITY CONJUGATELY CONJUGATING CONJUGATION CONJUGATIVE CONJUGATORS CONJUNCTIVA CONJURATION CONJURATORS CONNUMERATE CONSTRUABLE CONSTUPRATE CONSULTABLE CONSULTANCY CONSULTANTS CONSUMMATED CONSUMMATES CONSUMMATOR CONTEXTURAL CONTINUABLE CONTINUALLY CONTINUANCE CONTINUANTS CONTINUATOR CONTRACTUAL CONTRACTURE CONTRARIOUS CONTUBERNAL CONTUMACIES CONTUMACITY CONURBATION CONVENTUALS CONVULSANTS COPULATIONS COPULATIVES CORBICULATE CORNICULATE CORRUGATING CORRUGATION CORRUGATORS CORUSCATING CORUSCATION COTRANSDUCE COTYLOSAURS COUNTENANCE COUNTERACTS COUNTERBASE COUNTERDRAW COUNTERMAND COUNTERMARK COUNTERPACE COUNTERPANE COUNTERPART COUNTERPLAN COUNTERPLAY COUNTERPLEA COUNTERRAID COUNTERSANK COUNTERSEAL COUNTERVAIL COUNTRYSEAT COURTCRAFTS CRAPULOSITY CREMATORIUM CRENULATION CRUSTACEOUS CRUSTATIONS CULMINATION CULTIVATION CULTIVATORS CUMULATIONS CUNCTATIONS CUNCTATIOUS CUPELLATION CURATORSHIP CURNAPTIOUS CUSPIDATION CUSTOMARIES CUSTOMARILY CUTANEOUSLY DECURIONATE DECURVATION DECUSSATION DENUNCIATOR DIACOUSTICS DIDACTYLOUS DISACCUSTOM DOCUMENTARY DUPLICATION DUPLICATORS ECTOSARCOUS EDUCATIONAL EDULCORATED EDULCORATES EDULCORATOR EJACULATION EJACULATORS EJACULATORY ELUCIDATION ELUCIDATORS ELUCIDATORY EMASCULATOR ENUCLEATION ENUNCIATION ENUNCIATORS ENUNCIATORY EQUINOCTIAL EQUIVOCATED EQUIVOCATES EQUIVOCATOR ERUCTATIONS EUCALYPTOLE EUCALYPTOLS EUCHROMATIC EUCHROMATIN EUSOCIALITY EVACUATIONS EXCULPATION EXCULPATORY EXECUTORIAL FACETIOUSLY FECUNDATION FECUNDATORS FECUNDATORY FLOCCULANTS FLOCCULATED FLOCCULATES FLOCCULATOR FLUCTUATION FOLLICULATE FORFICULATE FRACTIOUSLY FRUCTUATION FUCOXANTHIN FUNCTIONALS FUNCTIONARY FUNCTIONATE GLAUCONITES GLAUCONITIC GOATSUCKERS GRANULOCYTE HOLOCAUSTAL HOLOCAUSTIC HOUSECRAFTS HUMECTATION ICHTHYOSAUR IMPORTUNACY INCUBATIONS INCULCATION INCULCATORS INCULCATORY INCULPATION INCULPATORY INCURVATION INDUCTIONAL INOCULATING INOCULATION INOCULATIVE INOCULATORS INOCULATORY INOSCULATED INOSCULATES INTEROCULAR INTRAOCULAR INVOLUCRATE ITACOLUMITE JACULATIONS JUDICATIONS KNOCKABOUTS LACTIFEROUS LACTIFLUOUS LACTOSURIAS LATROCINIUM LEUCOBLASTS LEUCOCRATIC LEUCOPLASTS LOCULAMENTS LOCULATIONS LOCUTIONARY LOQUACITIES LUBRICATION LUBRICATORS LUCUBRATION LUCUBRATORS LYTHRACEOUS MACULATIONS MALFUNCTION MANDUCATION MANDUCATORY MANUFACTORY MENTHACEOUS MERCURATION MONTICULATE MOUNTENANCE MOUSTACHIAL MOUSTACHIOS MUCRONATION MULTICARBON MULTICOATED MULTIFACTOR MULTIFOCALS MULTIVOCALS MUSCATORIUM MUSCULATION MUSTACHIOED NEUROACTIVE NEUROPATHIC NOCTIVAGOUS NOCTURNALLY NONCULTURAL NOVACULITES NUCLEATIONS NUCLEOLATED NUNCUPATION NUNCUPATORY NYCTANTHOUS OBFUSCATING OBFUSCATION OBFUSCATORY OBSCURANTIC OBSCURATION OBTRUNCATED OBTRUNCATES OCCULTATION OCCUPATIONS OCTONOCULAR OCTUPLICATE ONOCENTAURS OPERCULATED ORACULARITY ORBICULATED OSCULATIONS OSTRACODOUS OSTREACEOUS OUTACHIEVED OUTACHIEVES OUTBALANCED OUTBALANCES OUTCAPERING OUTCASTEING OUTCATCHING OUTCAVILING OUTCAVILLED OUTCHARGING OUTCHARMING OUTCHEATING OUTCLASSING OUTCOACHING OUTCRAFTIED OUTCRAFTIES OUTCRAWLING OUTDISTANCE OUTLAUNCHED OUTLAUNCHES OUTLAUNCING OUTMARCHING OUTMATCHING OUTPREACHED OUTPREACHES OUTREACHING OUTSCREAMED OUTWATCHING OVERCAUTION OVEREDUCATE PARAMOUNTCY PATCHOULIES PECULATIONS PLUTOCRATIC POCOCURANTE POSTNUCLEAR POSTOCULARS POURTRAICTS PRECAUTIONS PRECAUTIOUS PREOCCUPANT PREOCCUPATE PROCRUSTEAN PROCTODAEUM PROCURATION PROCURATORS PROCURATORY PROTEACEOUS PROVOCATEUR PUBLICATION PUNCTATIONS PUNCTUATION PUNCTUATORS PURIFICATOR QUADCOPTERS QUANGOCRATS RACONTEUSES RADIOLUCENT REACCUSTOMS RECATALOGUE RECAUTIONED RECUPERATOR RECUSATIONS REDUCTIONAL REEDUCATION REINOCULATE RELUCTATION RETOUCHABLE ROUGHCASTED ROUGHCASTER RUBEFACTION RUBRICATION RUBRICATORS RUSTICATION RUSTICATORS SACCULATION SANSCULOTTE SAPOTACEOUS SARCOMATOUS SCORDATURAS SCOTOMATOUS SCOUTCRAFTS SCOUTMASTER SECUROCRATS SETACEOUSLY SOUNDTRACKS SPATHACEOUS SPECULATION SPECULATORS SPECULATORY SPICULATION STAUROLITIC STAUROSCOPE STOMACHFULS SUBALLOCATE SUBCATEGORY SUBCOMPACTS SUBCONTRACT SUBCONTRARY SUBCORTICAL SUBSTRACTOR SUBTRACTION SUBTRACTORS SUBTROPICAL SUCCOTASHES SUFFOCATING SUFFOCATION SUFFOCATIVE SUGARCOATED SUPEROCTAVE SUPPORTANCE SUPRACOSTAL SUSCITATION TAUTOCHRONE TAUTOMETRIC TAUTOPHONIC TCHOUKBALLS TENACIOUSLY TENTACULOID THIOURACILS THOUGHTCAST TIBOUCHINAS TOUCHPAPERS TOURMALINIC TRADUCTIONS TRANSDUCTOR TREACHEROUS TREACHETOUR TRUNCATIONS TUBERACEOUS TUBERCULOMA TUMEFACTION ULCERATIONS ULTRASONICS UNACCOUNTED UNALLOCATED UNAPOSTOLIC UNCAPTIONED UNCATALOGED UNCOMATABLE UNCOMBATIVE UNCOMPACTED UNCOMPLIANT UNCONTAINED UNCOUNTABLE UNCUSTOMARY UNDECORATED UNDERACTION UNDERACTORS UNDERCOATED UNICOLORATE UNIDIOMATIC UNIFICATION UNPATRIOTIC UNPOLITICAL UNSOCIALITY UNTOUCHABLE UROCHORDATE URTICACEOUS URTICARIOUS URTICATIONS USUCAPTIONS VACUOLATION VOCABULISTS WATERCOLOUR WATERCOURSE