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