There are 539 eleven-letter words containing 2A, C, O and T, https://www.bestwordlist.com/c/a/5/11letterwordswithaacot.htm ABDICATIONS ABIOTICALLY ABLACTATION ABREACTIONS ABSORPTANCE ABSTRACTION ABSTRACTORS ACAROLOGIST ACCELERATOR ACCEPTATION ACCLAMATION ACCLAMATORY ACCLIMATION ACCOMMODATE ACCOMPANIST ACCOMPTABLE ACCOMPTANTS ACCORDANTLY ACCOUNTABLE ACCOUNTABLY ACCOUNTANCY ACCOUNTANTS ACCUBATIONS ACCUMULATOR ACCUSATIONS ACCUSTOMARY ACERVATIONS ACETOACETIC ACETONAEMIA ACETONEMIAS ACETONURIAS ACETYLATION ACHROMATINS ACHROMATISE ACHROMATISM ACHROMATIZE ACHROMATOUS ACIDULATION ACIERATIONS ACOELOMATES ACOUSTICIAN ACROBATISMS ACROPETALLY ACTINOZOANS ACTIVATIONS ACUMINATION ADAPTOGENIC ADJUDICATOR ADVOCATIONS AEROELASTIC AERONAUTICS AEROSTATICS AFFECTATION AFFECTIONAL AFFRICATION AGONISTICAL AHISTORICAL ALLOCATABLE ALLOCATIONS ALLOPLASTIC ALTERCATION AMENTACEOUS AMINOACETIC ANACOLUTHIA ANACOLUTHIC ANACOLUTHON ANACREONTIC ANAPLEROTIC ANASTOMOTIC ANCESTORIAL ANCHOVETTAS ANECDOTAGES ANECDOTALLY ANECDOTICAL ANFRACTUOUS ANIMATRONIC ANISODACTYL ANNUNCIATOR ANOMALISTIC ANTHOCYANIN ANTHOMANIAC ANTHRACNOSE ANTHRACOSES ANTHRACOSIS ANTHROPICAL ANTIALCOHOL ANTICATHODE ANTICIPATOR ANTIJACOBIN ANTILOGICAL ANTINOMICAL ANTISOCIALS ANTITOBACCO APOCALYPTIC APOCHROMATS APOCOPATING APOCOPATION APODICTICAL APOLAUSTICS APOMICTICAL APOSTATICAL APOSTOLICAL APPLICATION APPLICATORS APPLICATORY APPRECIATOR APRICATIONS ARAEOMETRIC ARCHONTATES ARCTOPHILIA AREFACTIONS ARISTOCRACY ARISTOCRATS AROMATICITY ARRAGONITIC ARTICULATOR ARTIODACTYL ASSOCIATING ASSOCIATION ASSOCIATIVE ASSOCIATORS ASSOCIATORY ASTRAPHOBIC ASTROCYTOMA ASTRONAUTIC ATOMISTICAL ATTRACTIONS AUSCULTATOR AUTHORCRAFT AUTOCEPHALY AUTOCHANGER AUTOCLAVING AUTOCRACIES AUTODIDACTS AUTOGRAPHIC AUTOMATICAL AUTONOMICAL AUTOPLASTIC AVOCATIONAL AXIOMATICAL AZOTOBACTER BARONETICAL BARRACOUTAS BATOLOGICAL BICARBONATE BIOCATALYST BOTANICALLY BOTANOMANCY BRACHIATION BRACHIATORS BRACTEOLATE BROADCASTED BROADCASTER CABBAGETOWN CACOGASTRIC CALCINATION CALCULATION CALCULATORS CALEFACTION CALEFACTORS CALEFACTORY CALIBRATION CALIBRATORS CALUMNIATOR CAMERATIONS CAMORRISTAS CAMPHORATED CAMPHORATES CANCELATION CANCERATION CANNULATION CANONICATES CANTALOUPES CANULATIONS CANZONETTAS CAPITATIONS CAPITULATOR CAPODASTROS CAPROLACTAM CAPSULATION CAPTIVATION CAPTIVATORS CARBONATING CARBONATION CARBONATITE CARBONYLATE CARBOXYLATE CARBURATION CARCINOMATA CARDIOPATHY CARNAPTIOUS CARNATIONED CARTOGRAPHY CARTONNAGES CASTIGATION CASTIGATORS CASTIGATORY CASTRATIONS CATABOLISED CATABOLISES CATABOLISMS CATABOLITES CATABOLIZED CATABOLIZES CATADROMOUS CATAFALCOES CATALOGISED CATALOGISES CATALOGIZED CATALOGIZES CATALOGUERS CATALOGUING CATALOGUISE CATALOGUIST CATALOGUIZE CATAPHONICS CATARACTOUS CATASTROPHE CATEGORICAL CATENACCIOS CATENATIONS CATHOLICATE CATOPTRICAL CAUSATIONAL CAVILLATION CAVITATIONS CERATOPSIAN CHAETOGNATH CHAOTICALLY CHARTACEOUS CHATOYANCES CHONDROMATA CLAIRVOYANT CLAMATORIAL CLAYMATIONS CLEPTOMANIA COACERVATED COACERVATES COADJACENTS COADJUTANTS COADUNATING COADUNATION COADUNATIVE COAGULATING COAGULATION COAGULATIVE COAGULATORS COAGULATORY COALITIONAL COALMASTERS COAPTATIONS COARCTATING COARCTATION COASTGUARDS COCAPTAINED COCATALYSTS COELACANTHS COHABITANTS COLLABORATE COLLATERALS COLLECTANEA COLORATURAS COMMANDANTS COMPAGINATE COMPARATIST COMPARATIVE COMPARATORS COMPEARANTS COMPLAINANT COMPLAISANT CONCATENATE CONDYLOMATA CONFABULATE CONFARREATE CONFLAGRANT CONFLAGRATE CONSONANTAL CONSTANTANS CONTACTABLE CONTAINABLE CONTAMINANT CONTAMINATE CONTRABANDS CONTRABASSI CONTRABASSO CONTRACTUAL CONTRADANCE CONTRARIANS CONTRAYERVA COPLANARITY COVARIATION CRAFTSWOMAN CREMATORIAL CROTALARIAS CYANIDATION DACTYLOGRAM DEACTIVATOR DEBARCATION DECANTATION DECAPITATOR DECARBONATE DECLAMATION DECLAMATORY DECLARATION DECLARATORS DECLARATORY DEFAECATION DEFAECATORS DEFALCATION DEFALCATORS DEMARCATION DEMARCATORS DICTATIONAL DICTATORIAL DIVARICATOR EDUCATIONAL EJACULATION EJACULATORS EJACULATORY EMACIATIONS EMANCIPATOR EMASCULATOR EMBARCATION ERADICATION ERADICATORS ERGATOCRACY EROTOMANIAC ESCALATIONS ESCAMOTAGES EVACUATIONS EXCARNATION EXCAVATIONS EXCLAMATION EXCLAMATORY FABRICATION FABRICATORS FACILITATOR FACTIONALLY FACTORIALLY FASCIATIONS FASCINATION FASCINATORS FRACTIONARY FRACTIONATE GALACTOSIDE GALACTOSYLS GASTROMANCY GEOTACTICAL GLACIATIONS GNATHONICAL GREATCOATED GYNAECOMAST HAEMATOCELE HAEMATOCRIT HAEMOSTATIC HEMATOCRYAL HOLOCAUSTAL IDIOMATICAL IMBROCCATAS INCANTATION INCANTATORS INCANTATORY INCARNATION INFRACOSTAL INTRAOCULAR ISOCYANATES JABOTICABAS JACTITATION JACULATIONS LABEFACTION LACERATIONS LACHRYMATOR LACINIATION LACRIMATION LACRIMATORS LACRIMATORY LACRYMATORS LACRYMATORY LACTATIONAL LACTOFLAVIN LACTOSURIAS LAICISATION LAICIZATION LANCEOLATED LANCINATION MACERATIONS MACHICOLATE MACHINATION MACHINATORS MACROBIOTAS MACRODACTYL MACROGAMETE MACULATIONS MADEFACTION MALEFACTION MALEFACTORS MALEFACTORY MANCIPATION MANCIPATORY MANDUCATION MANDUCATORY MANUFACTORY MASTICATION MASTICATORS MASTICATORY MATCHBOARDS MATROCLINAL METASOMATIC MISALLOCATE MISCATALOGS MOUSTACHIAL MYCODOMATIA MYTHOMANIAC NANOCRYSTAL NARROWCASTS NASOGASTRIC NEMATOCIDAL NOCTIVAGANT NONABSTRACT NONADJACENT NONANALYTIC NONANATOMIC NONAROMATIC NONATTACHED NONCAPITALS NONDRAMATIC NONTACTICAL NOSTRADAMIC NYCTALOPIAS OCTACHORDAL OCTAGONALLY OCTONARIANS ORACULARITY OUTBALANCED OUTBALANCES OXALACETATE OXALOACETIC PACIFICATOR PALAEOTYPIC PANNACOTTAS PANTISOCRAT PANTROPICAL PARACETAMOL PARACROSTIC PARADOCTORS PARAMOUNTCY PARFOCALITY PATCHBOARDS PATROCLINAL PEDANTOCRAT PHALLOCRATS PHANTOMATIC PINACOTHECA PISCATORIAL PLANTOCRACY POLYACTINAL POSTCRANIAL POSTGLACIAL PROCLAIMANT PROCTALGIAS PROCTODAEAL PTYALAGOGIC QUANGOCRATS RACEMATIONS RACTOPAMINE RADICATIONS RADIOACTIVE RADIOPACITY RADIOTRACER RAREFACTION RATIOCINATE REACTIONARY REALLOCATED REALLOCATES REBROADCAST RECANTATION RECATALOGED RECATALOGUE RECLAMATION REDACTIONAL REDACTORIAL RELOCATABLE SACCULATION SACROCOSTAL SALTIMBANCO SALTIMBOCCA SAPOTACEOUS SARCOMATOID SARCOMATOUS SCAMMONIATE SCAPEGOATED SCORDATURAS SHADOWCASTS SOMATICALLY SPATHACEOUS STAYCATIONS STENOCARDIA STIACCIATOS STOMACHACHE STOMACHICAL STRATOCRACY STRATOCRATS SUBALLOCATE SUGARCOATED SUPRACOSTAL TABEFACTION TACHOGRAPHS TACHYPNOEAS TAXONOMICAL TECHNOMANIA TERRACOTTAS THEOMANIACS THIOCYANATE THRASONICAL THROATLATCH TOCCATELLAS TOXICOMANIA TRAFFICATOR TRANSACTION TRANSACTORS TRANSLOCATE UNALLOCATED UNCATALOGED UNCOMATABLE VACATIONERS VACATIONING VACATIONIST VACCINATION VACCINATORS VACCINATORY VACILLATION VACILLATORS VACILLATORY VACUOLATION VASOSPASTIC VATICINATOR VICTORIANAS WAISTCOATED YACHTSWOMAN