There are 783 fourteen-letter words containing 2A and 2S, https://www.bestwordlist.com/c/a/4/14letterwordswithaass.htm
ABOMINABLENESS ABORIGINALISMS ABRASIVENESSES ABSTRACTEDNESS ABSTRACTIONISM
ABSTRACTIONIST ABSTRACTNESSES ACADEMICALISMS ACATAMATHESIAS ACCEPTABLENESS
ACCIDENTALISMS ACCIDENTALNESS ACCURATENESSES ACCUSTOMATIONS ACHROMATOPSIAS
ACTUALISATIONS ADAPTATIONISTS ADAPTIVENESSES ADDRESSABILITY ADEQUATENESSES
ADMEASUREMENTS ADMINISTRATORS ADORABLENESSES ADULARESCENCES ADVISABILITIES
AEROBALLISTICS AEROSOLISATION AFFORESTATIONS AFTERSENSATION ALKALESCENCIES
AMATEURISHNESS AMBASSADORSHIP AMBASSADRESSES AMENABLENESSES AMICABLENESSES
AMPHIARTHROSES AMPHIARTHROSIS ANAESTHETISING ANAGRAMMATISES ANAGRAMMATISMS
ANAGRAMMATISTS ANALPHABETISMS ANAPHRODISIACS ANARTHROUSNESS ANASTIGMATISMS
ANATOMISATIONS ANELASTICITIES ANGIOSTOMATOUS ANGLICISATIONS ANIMADVERSIONS
ANIMALISATIONS ANISODACTYLOUS ANISOMETROPIAS ANKYLOSAURUSES ANNEXATIONISMS
ANNEXATIONISTS ANNUITISATIONS ANONYMISATIONS ANSWERABLENESS ANTIAGGRESSION
ANTIASTHMATICS ANTIBARBARUSES ANTIDEPRESSANT ANTIDESICCANTS ANTIFORMALISMS
ANTIFORMALISTS ANTIHARASSMENT ANTIHISTAMINES ANTIMECHANISTS ANTIMETATHESES
ANTIMETATHESIS ANTINOMIANISMS ANTIPARASITICS ANTIPERISTASES ANTIPERISTASIS
ANTIQUATEDNESS ANTIRITUALISMS ANTISEPARATIST ANTISOCIALISMS ANTISOCIALISTS
ANTISPASMODICS ANTONINIANUSES APOCHROMATISMS APOCRYPHALNESS APOTHEGMATISES
APOTHEGMATISTS APPARENTNESSES APPLICABLENESS AQUACULTURISTS ARABICISATIONS
ARACHNOLOGISTS ARCHAEOLOGISTS ARISTOCRATISMS AROMATISATIONS ARTHROPLASTIES
ARTICULATENESS ARTIFICIALISES ARTIFICIALNESS ASCERTAINMENTS ASSASSINATIONS
ASSAULTIVENESS ASSEVERATINGLY ASSIMILABILITY ASSIMILATIVELY ASSISTANTSHIPS
ASSOCIATESHIPS ASSOCIATIONISM ASSOCIATIONIST ASSUMABILITIES ASTRAPOPHOBIAS
ASTROCOMPASSES ATTAINABLENESS ATTRACTIVENESS AUDIOCASSETTES AUTHORISATIONS
AUTOSCHEDIASMS AUTOSCHEDIAZES AVARICIOUSNESS AVASCULARITIES AVOWABLENESSES
BACKHANDEDNESS BACKSCRATCHERS BACKWARDNESSES BACTERIOSTASES BACTERIOSTASIS
BACTERISATIONS BALKANISATIONS BALSAMINACEOUS BANCASSURANCES BANDERSNATCHES
BANDSPREADINGS BARBARISATIONS BARNSBREAKINGS BASTARDISATION BEARABLENESSES
BIOSTATISTICAL BIPARTISANISMS BIPARTISANSHIP BLACKGUARDISMS BLAMABLENESSES
BLEPHAROPLASTS BLEPHAROSPASMS BOUILLABAISSES BRUTALISATIONS BUREAUCRATESES
BUREAUCRATISES BUREAUCRATISMS BUREAUCRATISTS CADAVEROUSNESS CAESAROPAPISMS
CALAMITOUSNESS CALCULATEDNESS CALLIGRAPHISTS CAMPANOLOGISTS CANDIDATESHIPS
CANTONISATIONS CARBONISATIONS CARBURISATIONS CARCINOMATOSES CARCINOMATOSIS
CARTELISATIONS CASUALISATIONS CASUALIZATIONS CATASTROPHISMS CATASTROPHISTS
CATECHISATIONS CAUTERISATIONS CEPHALISATIONS CHANGEABLENESS CHARACTERISERS
CHARGEABLENESS CHARITABLENESS CICATRISATIONS CLASSICALITIES CLASSIFICATION
CLASSIFICATORY CLISHMACLAVERS COASTGUARDSMAN COASTGUARDSMEN COCAINISATIONS
COCARBOXYLASES COENAESTHESIAS COLLATERALISES COMPARABLENESS COMPARATIVISTS
COMPASSIONABLE COMPASSIONATED COMPASSIONATES CONNATURALISES CONNATURALNESS
CONSTABULARIES CONSUBSTANTIAL CONTRABANDISMS CONTRABANDISTS CONTRABASSISTS
CONTRABASSOONS CONTRARIANISMS COUNTERASSAULT CRAFTSMANSHIPS CRYPTAESTHESIA
CRYSTALISATION CRYSTALLISABLE DAMNABLENESSES DEAMINISATIONS DECAPSULATIONS
DECARBOXYLASES DECLASSIFIABLE DEMATERIALISES DENATIONALISES DEREALISATIONS
DESALINISATION DESQUAMATORIES DEXAMETHASONES DIABOLICALNESS DIAGNOSTICIANS
DIAPHANOUSNESS DIAZOTISATIONS DISACCHARIDASE DISAFFIRMANCES DISAPPEARANCES
DISARTICULATES DISASSIMILATED DISASSIMILATES DISASSOCIATING DISASSOCIATION
DISCAPACITATES DISEMBARRASSED DISEMBARRASSES DISHABILITATES DISNATURALISED
DISNATURALISES DISNATURALIZES DISPARAGEMENTS DISPENSATIONAL DISPLANTATIONS
DISPLEASANTING DISSERTATIONAL DOGMATICALNESS DOGMATISATIONS DOLLARISATIONS
DRACUNCULIASES DRACUNCULIASIS DRAFTSMANSHIPS DRAMATISATIONS ECCLESIASTICAL
EMBARRASSINGLY EMBARRASSMENTS EMPHATICALNESS ENCAPSULATIONS ENDOPARASITISM
ENTHUSIASTICAL ENTOMOSTRACANS EPIGRAMMATISES EPIGRAMMATISMS EPIGRAMMATISTS
ERGASTOPLASMIC EUPHAUSIACEANS EXTRAVASATIONS FACTORISATIONS FALLACIOUSNESS
FALSIFICATIONS FAMILIARNESSES FARCICALNESSES FASCICULATIONS FATIGUABLENESS
FAVOURABLENESS FEUDALISATIONS FLAGELLANTISMS FLAGRANTNESSES FORMALISATIONS
FRACTIONALISES FRACTIONALISMS FRACTIONALISTS FRAGRANTNESSES FRUITARIANISMS
GALACTOPOIESES GALACTOPOIESIS GALACTOSAEMIAS GALACTOSAMINES GALACTOSIDASES
GALLICISATIONS GALVANISATIONS GALVANOSCOPIES GASTROPLASTIES GASTROVASCULAR
GERMANISATIONS GLADIATORSHIPS GLAMORISATIONS GLOBALISATIONS GRADABLENESSES
GRANDSTANDINGS GRANITISATIONS GRANTSMANSHIPS GYNAECOMASTIAS GYNAECOMASTIES
HABERDASHERIES HABITUALNESSES HAEMATOGENESES HAEMATOGENESIS HAEMATOLOGISTS
HAEMATOPOIESES HAEMATOPOIESIS HAEMODIALYSERS HAGIOGRAPHISTS HAMARTHRITISES
HARDHANDEDNESS HARDHEADEDNESS HARDINGGRASSES HARMONISATIONS HARUSPICATIONS
HAUSSMANNISING HAUSSMANNIZING HEADMASTERSHIP HEXOSAMINIDASE HYALINISATIONS
HYALURONIDASES HYPERAESTHESIA HYPERAWARENESS HYPERPARASITES IMAGINABLENESS
IMMACULATENESS IMMATERIALISES IMMATERIALISMS IMMATERIALISTS IMMATERIALNESS
IMMUNOASSAYIST IMPASSABLENESS IMPLACABLENESS INACCURATENESS INADEQUATENESS
INCAPSULATIONS INSANITARINESS INSATIABLENESS INSTANTIATIONS INTRANSIGEANTS
INTRAVASATIONS INVALUABLENESS INVARIABLENESS IRRATIONALISES IRRATIONALISMS
IRRATIONALISTS IRRATIONALNESS ISOALLOXAZINES ISOCARBOXAZIDS ITALICISATIONS
JARGONISATIONS KAKISTOCRACIES KERATOPLASTIES LABIALISATIONS LAMENTABLENESS
LAPAROSCOPISTS LAUDABLENESSES LAXATIVENESSES LEMMATISATIONS LIBRARIANSHIPS
LINEARISATIONS LOGODAEDALUSES LYMPHOSARCOMAS MAGISTRALITIES MAGISTRATESHIP
MAGNETISATIONS MAGNETOSTATICS MAINSTREAMINGS MAJESTICALNESS MALABSORPTIONS
MALACOSTRACANS MALACOSTRACOUS MALADJUSTMENTS MALADMINISTERS MALAPERTNESSES
MALARIOLOGISTS MALEFACTRESSES MANAGEABLENESS MANAGERIALISMS MANAGERIALISTS
MANIFESTATIONS MANRIKIGUSARIS MARKETABLENESS MARKETISATIONS MARSIPOBRANCHS
MARTYRISATIONS MASSIFICATIONS MASSOTHERAPIES MASSOTHERAPIST MASTIGOPHORANS
MATERIALNESSES MATHEMATICISES MATHEMATICISMS MATRESFAMILIAS MEASURABLENESS
MECHANICALISMS MECHANICALNESS MECHANISATIONS MEDIATISATIONS MEGALOSAURIANS
MELASTOMACEOUS MELODRAMATISES MELODRAMATISTS METAGRABOLISES METALLISATIONS
METAPHOSPHATES METAPHYSICIANS MICROPARASITES MISALLOCATIONS MISAPPRECIATES
MISARTICULATES MISCALCULATORS MISEVALUATIONS MISMANAGEMENTS MISTRANSLATING
MISTRANSLATION MUSICALISATION MUTUALISATIONS NARCOCATHARSES NARCOCATHARSIS
NARCOTISATIONS NARRATOLOGISTS NARROWCASTINGS NECESSARIANISM NECESSITARIANS
NEMATODIRIASES NEMATODIRIASIS NEOCAPITALISMS NEOCAPITALISTS NEURAMINIDASES
NEURASTHENIACS NEUROBLASTOMAS NONCAPITALISTS NONMAINSTREAMS NONSENSATIONAL
NONSTATISTICAL NORMALISATIONS NORTHEASTWARDS OCCASIONALISMS OCCASIONALISTS
ORACULARNESSES ORCHARDGRASSES OSTEOSARCOMATA OVERDRAMATISES PALATIALNESSES
PALEOBOTANISTS PALLETISATIONS PALPABLENESSES PANAESTHETISMS PANARTHRITISES
PANCHROMATISMS PANCREATITISES PANGRAMMATISTS PANSEXUALITIES PANSPERMATISMS
PANSPERMATISTS PANTISOCRACIES PANTISOCRATIST PAPAPRELATISTS PAPILLOMATOSES
PAPILLOMATOSIS PARAMAGNETISMS PARAMENSTRUUMS PARANTHROPUSES PARASITISATION
PARASITOLOGIES PARASITOLOGIST PARDONABLENESS PARTICULARISES PARTICULARISMS
PARTICULARISTS PARTICULARNESS PASSABLENESSES PASSIONATENESS PASTEURISATION
PASTORALNESSES PATRESFAMILIAS PATRONISATIONS PAUPERISATIONS PHALANSTERIANS
PHALANSTERISMS PHALANSTERISTS PHARMACEUTISTS PHOTOCATALYSES PHOTOCATALYSIS
PHYSHARMONICAS PLACABLENESSES PLASMAPHERESES PLASMAPHERESIS PLASTICISATION
PLATINISATIONS PLEASANTNESSES PLESIOSAURIANS PLURALISATIONS POLYSACCHAROSE
POSTAPOCALYPSE POSTCAPITALIST POSTLAPSARIANS POSTMENOPAUSAL PRIVATISATIONS
PROCRASTINATES PROPAGABLENESS PROPAGANDISERS PROSOPAGNOSIAS PROSTAGLANDINS
PROTOSPATAIRES PSEPHOANALYSES PSEPHOANALYSIS PSEUDAESTHESIA PSYCHASTHENIAS
PSYCHOANALYSED PSYCHOANALYSER PSYCHOANALYSES PSYCHOANALYSIS PSYCHOANALYSTS
PSYCHOANALYZES QUAESTIONARIES QUARTERMASTERS QUASIPARTICLES RADIALISATIONS
RADIORESISTANT RAMPAGEOUSNESS RANDOMISATIONS RATEABLENESSES RATIONALNESSES
REACCLIMATISES REACTIONARISMS REACTIONARISTS READABLENESSES REASONABLENESS
RECONNAISSANCE REMARKABLENESS REMATERIALISES RENATIONALISES RESTAURANTEURS
RETRANSLATIONS REWARDABLENESS RHABDOMANTISTS RITUALISATIONS SACCHARIFEROUS
SACCHARIMETERS SACCHARINITIES SACCHARISATION SACCHAROMETERS SACERDOTALISED
SACERDOTALISES SACERDOTALISMS SACERDOTALISTS SACERDOTALIZES SACRALISATIONS
SACRALIZATIONS SACRAMENTALISM SACRAMENTALIST SACRAMENTARIES SACROSANCTNESS
SADOMASOCHISMS SADOMASOCHISTS SALEABLENESSES SALUTARINESSES SALVABLENESSES
SANGUINARINESS SANITARIANISMS SANITARINESSES SANITATIONISTS SATISFACTORILY
SATURABILITIES SAVEABLENESSES SAXIFRAGACEOUS SCALABLENESSES SCANDALISATION
SCANDALMONGERS SCANDALOUSNESS SCAPEGALLOWSES SCAPHOCEPHALUS SCAPULIMANCIES
SCAPULOMANCIES SCARIFICATIONS SCENARISATIONS SCENARIZATIONS SCHEMATISATION
SCHISMATICALLY SCHOLASTICALLY SCHOLASTICATES SCLEROMALACIAS SEASONABLENESS
SEASONALNESSES SECTARIANISING SECULARISATION SEMASIOLOGICAL SEMIAUTOMATICS
SEMICARBAZIDES SEMICARBAZONES SEMIPALMATIONS SEMIPARASITISM SENSATIONALISE
SENSATIONALISM SENSATIONALIST SENSATIONALIZE SENSUALISATION SENSUALIZATION
SEPARABILITIES SEPARATENESSES SEPARATIONISMS SEPARATIONISTS SEPARATIVENESS
SEPTUAGENARIES SERIALISATIONS SERIALIZATIONS SERRATIROSTRAL SESQUIPEDALIAN
SEXUALISATIONS SEXUALIZATIONS SHADOWCASTINGS SHADOWGRAPHIES SHAMEFACEDNESS
SHAREABILITIES SHERARDISATION SIGNALISATIONS SIGNALIZATIONS SIMAROUBACEOUS
SKATEBOARDINGS SOCIALISATIONS SOCIALIZATIONS SOMNAMBULANCES SOMNAMBULATORS
SOUTHEASTWARDS SPARROWGRASSES SPATIALISATION SPECIALISATION SPERMATOBLASTS
SPERMATORRHEAS SPERMATOTHECAS SPHAEROCRYSTAL SPORADICALNESS SQUANDERMANIAS
SQUATTOCRACIES STABILISATIONS STABILIZATIONS STADHOLDERATES STAGECOACHINGS
STAINABILITIES STALAGMOMETERS STALWARTNESSES STAPHYLOPLASTY STATESMANLIEST
STATESMANSHIPS STATIONARINESS STATIONMASTERS STIGMATISATION STOCHASTICALLY
STOMATOGASTRIC STRANGULATIONS STRATIGRAPHERS STRATIGRAPHIES STRATIGRAPHIST
STRATOVOLCANOS SUBALLOCATIONS SUBAPPEARANCES SUBASSOCIATION SUBMANDIBULARS
SUBMAXILLARIES SUBSATURATIONS SUBSTANTIALISE SUBSTANTIALISM SUBSTANTIALIST
SUBSTANTIALITY SUBSTANTIALIZE SUBSTANTIATING SUBSTANTIATION SUBSTANTIATIVE
SUBSTANTIATORS SUBSTANTIVALLY SUFFRAGANSHIPS SULFACETAMIDES SULFANILAMIDES
SULFATHIAZOLES SULPHADIAZINES SUMMARISATIONS SUMMARIZATIONS SUOVETAURILIAS
SUPERNATATIONS SUPERSATURATED SUPERSATURATES SUPPLANTATIONS SUPRALAPSARIAN
SUPRASEGMENTAL SUSTAINABILITY SYLLABICATIONS SYNAPOSEMATISM SYSTEMATICALLY
SYSTEMATICIANS TACHYGRAPHISTS TAMEABLENESSES TANTALISATIONS TARSOMETATARSI
TARTARISATIONS TELANGIECTASES TELANGIECTASIS TETRAGONALNESS TETRASYLLABLES
THALASSOGRAPHY THANATOLOGISTS THAUMATURGISMS THAUMATURGISTS THAUMATURGUSES
THEATRICALISES THEATRICALISMS THEATRICALNESS THEMATISATIONS THERMAESTHESIA
THREADBARENESS TRAGICALNESSES TRANSACTINIDES TRANSCALENCIES TRANSCAUCASIAN
TRANSCRIPTASES TRANSCUTANEOUS TRANSEXUALISMS TRANSLITERATES TRANSLOCATIONS
TRANSMIGRATORS TRANSMISSIONAL TRANSMITTANCES TRANSMUTATIONS TRANSPARENCIES
TRANSPARENTISE TRANSPIRATIONS TRANSPLANTINGS TRANSPORTANCES TRANSSEXUALISM
TRANSSEXUALITY TRANSVERSALITY TRILATERALISMS TRILATERALISTS TRISACCHARIDES
TYRANNICALNESS TYRANNOSAURIDS ULTRAROYALISTS UNAVAILINGNESS UNBEARABLENESS
UNCLASSIFIABLE UNCLASSIFIABLY UNEMBARRASSING UNFASHIONABLES UNICAMERALISMS
UNICAMERALISTS UNILATERALISMS UNILATERALISTS UNPASSABLENESS UNPLEASANTNESS
UNPLEASANTRIES UNREADABLENESS UNSALABILITIES UNSATISFACTION UNSATISFACTORY
UNSECTARIANISM UNSHAKABLENESS UNSTANDARDISED UNSYSTEMATICAL UNTAMEABLENESS
URALITISATIONS URANOGRAPHISTS VACUOLISATIONS VALUABLENESSES VANDALISATIONS
VARIABLENESSES VARIOLISATIONS VASOACTIVITIES VEGETARIANISMS VERBALISATIONS
VERNACULARISES VERNACULARISMS VERNACULARISTS VERNALISATIONS VILLAGISATIONS
VISUALISATIONS VISUALIZATIONS VOCATIONALISMS VOCATIONALISTS VOLCANISATIONS
VRAISEMBLANCES VULCANISATIONS VULGARISATIONS WAPPENSHAWINGS WEATHERCASTERS
WEATHERGLASSES XIPHIPLASTRALS YACHTSMANSHIPS