There are 702 eleven-letter words containing 2A, O, S and T, https://www.bestwordlist.com/c/a/5/11letterwordswithaaost.htm ABDICATIONS ABERRATIONS ABJURATIONS ABLATITIOUS ABLUTOMANES ABNEGATIONS ABOMINATORS ABORTUARIES ABREACTIONS ABROGATIONS ABSORPTANCE ABSTRACTION ABSTRACTORS ACAROLOGIST ACCOMPANIST ACCOMPTANTS ACCOUNTANTS ACCUBATIONS ACCUSATIONS ACCUSTOMARY ACERVATIONS ACETONEMIAS ACETONURIAS ACHROMATINS ACHROMATISE ACHROMATISM ACHROMATOUS ACIERATIONS ACOELOMATES ACOUSTICIAN ACROBATISMS ACTINOZOANS ACTIVATIONS ADAPTATIONS ADELANTADOS ADENOMATOUS ADIAPHORIST ADJURATIONS ADMIRATIONS ADOPTIANISM ADOPTIANIST ADVISORATES ADVOCATIONS AEROELASTIC AERONAUTICS AEROSTATICS AEROSTATION AESTIVATION AESTIVATORS AFFIXATIONS AGGREGATORS AGONISTICAL AGREGATIONS AGROSTEMMAS AHISTORICAL ALBATROSSES ALGOLAGNIST ALIENATIONS ALINEATIONS ALKYLATIONS ALLANTOIDES ALLANTOISES ALLEGATIONS ALLEVIATORS ALLIGATIONS ALLOCATIONS ALLOPATHIES ALLOPATHIST ALLOPATRIES ALLOPLASTIC ALPHASORTED ALPROSTADIL ALTERATIONS ALTERNATORS ALTOSTRATUS AMAZONSTONE AMBULATIONS AMELIORANTS AMELIORATES AMELOBLASTS AMENTACEOUS AMETABOLISM AMETABOLOUS AMORALITIES AMORTISABLE AMPLIATIONS AMPUTATIONS AMYLOPLASTS ANALYSATION ANASTOMOSED ANASTOMOSES ANASTOMOSIS ANASTOMOTIC ANASTROPHES ANASTROZOLE ANATOMISERS ANATOMISING ANATOMIZERS ANCESTORIAL ANCHOVETTAS ANECDOTAGES ANFRACTUOUS ANGIOMATOUS ANGIOPLASTY ANGULATIONS ANGWANTIBOS ANHELATIONS ANISODACTYL ANNEXATIONS ANNOTATIONS ANNULATIONS ANODISATION ANOMALISTIC ANTAGONISED ANTAGONISES ANTAGONISMS ANTAGONISTS ANTAGONIZES ANTHOMANIAS ANTHOTAXIES ANTHRACNOSE ANTHRACOSES ANTHRACOSIS ANTIBARYONS ANTIFASHION ANTIMONATES ANTIMONIALS ANTINOMIANS ANTIPHONALS ANTIPODEANS ANTISOCIALS ANTONOMASIA APARTHOTELS APATOSAURUS APOCHROMATS APOLAUSTICS APOSTATICAL APOSTATISED APOSTATISES APOSTATIZED APOSTATIZES APOSTOLATES APOSTOLICAL APOTROPAISM APPARITIONS APPLICATORS APRICATIONS AQUAFORTIST ARABISATION ARAEOMETERS ARAEOSTYLES ARBITRATORS ARBORVITAES ARCHONTATES AREFACTIONS AREOLATIONS ARISTOCRACY ARISTOCRATS AROMATISING ARRAGONITES ARRESTATION ARROGATIONS ARYTAENOIDS ASAFOETIDAS ASPERGATION ASPHYXIATOR ASPIRATIONS ASPORTATION ASSAFOETIDA ASSENTATION ASSENTATORS ASSIGNATION ASSIMILATOR ASSOCIATING ASSOCIATION ASSOCIATIVE ASSOCIATORS ASSOCIATORY ASSORTATIVE ASTEROIDEAN ASTHENOPIAS ASTRAPHOBIA ASTRAPHOBIC ASTROBOTANY ASTROCYTOMA ASTRONAUTIC ASTROPHOBIA ATHERMANOUS ATOMISATION ATOMISTICAL ATONALITIES ATRABILIOUS ATRAMENTOUS ATTENUATORS ATTESTATION ATTESTATORS ATTRACTIONS AUSCULTATOR AUTOCRACIES AUTODIDACTS AUTOLATRIES AUTOLOADERS AUTOLYSATES AUTOLYZATES AUTOMATIONS AUTOMATISED AUTOMATISES AUTOMATISMS AUTOMATISTS AUTOMATIZES AUTOPHAGIAS AUTOPHAGIES AUTOPHAGOUS AUTOPHANOUS AUTOPHOBIAS AUTOPLASTIC AUTOROTATES AUTOSAMPLER AUTOSOMALLY AUTOSTRADAS AXIOMATISED AXIOMATISES AXIOMATIZES BALNEATIONS BALSAMROOTS BARDOLATERS BARONETAGES BAROTRAUMAS BARRACOUTAS BASTINADOED BASTINADOES BIOCATALYST BLASTOPORAL BODHISATTVA BRACHIATORS BROADCASTED BROADCASTER CACOGASTRIC CALCULATORS CALEFACTORS CALIBRATORS CAMERATIONS CAMORRISTAS CAMPHORATES CANONICATES CANTALOUPES CANULATIONS CANZONETTAS CAPITATIONS CAPODASTROS CAPSULATION CAPTIVATORS CARNAPTIOUS CARTONNAGES CASTIGATION CASTIGATORS CASTIGATORY CASTRATIONS CATABOLISED CATABOLISES CATABOLISMS CATABOLITES CATABOLIZES CATADROMOUS CATAFALCOES CATALOGISED CATALOGISES CATALOGIZES CATALOGUERS CATALOGUISE CATALOGUIST CATAPHONICS CATARACTOUS CATASTROPHE CATENACCIOS CATENATIONS CAUSATIONAL CAVITATIONS CERATOPSIAN CHARTACEOUS CHATOYANCES CLAYMATIONS COACERVATES COADJACENTS COADJUTANTS COAGULATORS COALMASTERS COAPTATIONS COASTGUARDS COCATALYSTS COELACANTHS COHABITANTS COLLATERALS COLORATURAS COMMANDANTS COMPARATIST COMPARATORS COMPEARANTS COMPLAISANT CONSONANTAL CONSTANTANS CONTRABANDS CONTRABASSI CONTRABASSO CONTRARIANS CRAFTSWOMAN CROTALARIAS DATAMATIONS DEAERATIONS DEALBATIONS DECLARATORS DEFAECATORS DEFALCATORS DEFAMATIONS DEMARCATORS DESALINATOR DEVASTATION DEVASTATORS DIALYSATION DIATESSARON DILATATIONS DIVAGATIONS DRAFTSWOMAN EJACULATORS ELABORATORS EMACIATIONS EMASCULATOR ENARRATIONS ENTOPLASTRA EQUATORIALS ERADIATIONS ERADICATORS EROTOMANIAS ESCALATIONS ESCAMOTAGES ESTRAMAZONE EVACUATIONS EVALUATIONS EVAPORATORS EXALTATIONS EXAMINATORS EXAPTATIONS EXASPERATOR EXCAVATIONS EXHALATIONS EXOPARASITE EXPATIATORS FABRICATORS FANTABULOUS FASCIATIONS FASCINATION FASCINATORS FASHIONISTA FLAMBOYANTS FLOATATIONS FLOATPLANES FOREMASTMAN GALACTOSIDE GALACTOSYLS GARBURATORS GASTROMANCY GASTROPODAN GESTATIONAL GESTATORIAL GLACIATIONS GLASNOSTIAN GOATSBEARDS GRADATORIES GRADUATIONS GRANULATORS GYNAECOMAST HABITATIONS HAEMOSTASES HAEMOSTASIA HAEMOSTASIS HAEMOSTATIC HAGIOLATERS HALOGENATES HEMATOBLAST HEMOSTASIAS HOLOCAUSTAL HYDROSOMATA HYOPLASTRAL HYPOGASTRIA HYPOPLASTRA IMBROCCATAS IMMANATIONS IMPANATIONS IMPASTATION INCANTATORS INDAGATIONS INFRACOSTAL INHALATIONS INSTAURATOR IRRADIATORS IRRATIONALS ISOCYANATES JABOTICABAS JACULATIONS KATABOLISMS KATADROMOUS KETONAEMIAS KYANISATION LACERATIONS LACRIMATORS LACRYMATORS LACTOSURIAS LAICISATION LAMINATIONS LANTHANOIDS LAPIDATIONS LATIROSTRAL LATITATIONS LAUDATORIES LAUNDROMATS LAUREATIONS LOADMASTERS LOVASTATINS MACERATIONS MACHINATORS MACROBIOTAS MACULATIONS MAINTOPMAST MAINTOPSAIL MALAPROPIST MALAXATIONS MALEFACTORS MALLEATIONS MAMMALOGIST MAMMOPLASTY MANDATORIES MARATHONERS MARINATIONS MARTELLATOS MASTICATION MASTICATORS MASTICATORY MASTODYNIAS MASTURBATOR MATCHBOARDS MATRIOSHKAS MATROYSHKAS MATRYOSHKAS MATURATIONS MAXIMATIONS MAYORALTIES MEGALOBLAST MEGASTARDOM MELANOBLAST MESOGASTRIA METASEQUOIA METASOMATIC METHOMANIAS METROMANIAS MISALLOCATE MISCATALOGS MONASTERIAL MONTAGNARDS MORTADELLAS MOUSTACHIAL MYTHOMANIAS NANISATIONS NANIZATIONS NANOCRYSTAL NARROWBOATS NARROWCASTS NASOFRONTAL NASOGASTRIC NATATORIUMS NATIONALISE NATIONALISM NATIONALIST NATUROPATHS NAUSEATIONS NAVIGATIONS NEAPOLITANS NEMATOBLAST NONABSTRACT NONCAPITALS NONPARTISAN NONSTANDARD NOSTOMANIAS NOSTRADAMIC NYCTALOPIAS OCTONARIANS ODONTALGIAS OPHTHALMIAS ORNAMENTALS OUTBALANCES OUTBARGAINS PADDLEBOATS PAGINATIONS PALAEOLITHS PALAEOTYPES PALAGONITES PALLIATIONS PANNACOTTAS PANTISOCRAT PANTOGRAPHS PAPULATIONS PARABOLISTS PARACROSTIC PARADOCTORS PARADOXISTS PARAGONITES PARALOGISTS PARAMASTOID PARASITOIDS PARASITOSES PARASITOSIS PASSIONATED PASSIONATES PASSIVATION PASTEBOARDS PASTORALISM PASTORALIST PATCHBOARDS PATINATIONS PATRIATIONS PENTAGONALS PHALLOCRATS PHOSPHATASE PHYTOPLASMA PISCATORIAL PLANOBLASTS PLANTATIONS PLANTSWOMAN POHUTUKAWAS POLYMASTIAS PORTABELLAS PORTMANTUAS POSTCRANIAL POSTGLACIAL POSTMARITAL POSTNATALLY PRAETORIANS PREPARATORS PROCTALGIAS PROPAGATORS PROTANOPIAS PUFTALOONAS QUAESTORIAL QUANGOCRATS QUARTATIONS QUATORZAINS RACEMATIONS RADICATIONS RAPPORTAGES RASPATORIES RATIONALISE RATIONALISM RATIONALIST REALISATION REALLOCATES REBROADCAST RELAXATIONS REPARATIONS RETALIATORS RITARDANDOS SABURRATION SACCULATION SACROCOSTAL SAGINATIONS SAILBOATERS SAILBOATING SALBUTAMOLS SALIVATIONS SALTARELLOS SALTATORIAL SALTIMBANCO SALTIMBOCCA SALUTATIONS SALVATIONAL SALVATORIES SANATORIUMS SANDALFOOTS SANITATIONS SAPOTACEOUS SARCOMATOID SARCOMATOUS SARTORIALLY SATANOPHANY SATURATIONS SCAMMONIATE SCAPEGOATED SCORDATURAS SEASONALITY SENSATIONAL SEPARATIONS SHADOWCASTS SITUATIONAL SKATEBOARDS SOLITARIANS SOLIVAGANTS SOMATICALLY SOMATOPLASM SOMATOTONIA SPALLATIONS SPANAKOPITA SPANIOLATED SPANIOLATES SPANOKOPITA SPARROWFART SPATANGOIDS SPATHACEOUS SPERMATOZOA SQUAMATIONS STAGFLATION STAGNATIONS STALKERAZZO STAPHYLOMAS STARBOARDED STARVATIONS STATESWOMAN STATOBLASTS STAYCATIONS STEATOPYGAS STEATOPYGIA STEATORRHEA STEGANOGRAM STELLARATOR STENOCARDIA STEREOTAXIA STIACCIATOS STOMACHACHE STOMACHICAL STOMATODAEA STRAPPADOED STRAPPADOES STRATOCRACY STRATOCRATS STRATOPAUSE STRAWBOARDS SUBALLOCATE SUBARRATION SUBNATIONAL SUBPANATION SUBRATIONAL SUGARCOATED SUMMATIONAL SUPRACOSTAL SWALLOWTAIL SYPHILOMATA TABOPARESES TABOPARESIS TABULATIONS TACHOGRAPHS TACHYPNOEAS TAILORMAKES TANKERLOADS TERRACOTTAS TESSARAGLOT THANATOPSES THANATOPSIS THEOMANIACS THRASONICAL TITANOSAURS TOADGRASSES TOASTMASTER TOCCATELLAS TOPAGNOSIAS TOPGALLANTS TOTALISATOR TOXOPLASMAS TRABEATIONS TRADESWOMAN TRAILBASTON TRAMONTANAS TRAMONTANES TRANSACTION TRANSACTORS TRANSLATION TRANSLATORS TRANSLATORY TRANSLOCATE TRANSPHOBIA TRANSPORTAL TRANSPOSALS TRAVELATORS TRAVOLATORS TREASONABLE TREASONABLY TRITANOPIAS TSOTSITAALS TYRANNOSAUR URANOPLASTY VACATIONERS VACATIONIST VACCINATORS VACILLATORS VALIDATIONS VAPULATIONS VARIEGATORS VARIOLATORS VASODILATOR VASOSPASTIC VICTORIANAS WAISTCOATED XANTHATIONS XANTHOPSIAS XEROSTOMATA YACHTSWOMAN