There are 635 fourteen-letter words containing 2A, I and 2S, https://www.bestwordlist.com/c/a/5/14letterwordswithaaiss.htm ABOMINABLENESS ABORIGINALISMS ABRASIVENESSES ABSTRACTIONISM ABSTRACTIONIST ACADEMICALISMS ACATAMATHESIAS ACCIDENTALISMS ACCIDENTALNESS ACCUSTOMATIONS ACHROMATOPSIAS ACTUALISATIONS ADAPTATIONISTS ADAPTIVENESSES ADDRESSABILITY ADMINISTRATORS ADVISABILITIES AEROBALLISTICS AEROSOLISATION AFFORESTATIONS AFTERSENSATION ALKALESCENCIES AMATEURISHNESS AMBASSADORSHIP AMICABLENESSES AMPHIARTHROSES AMPHIARTHROSIS ANAESTHETISING ANAGRAMMATISES ANAGRAMMATISMS ANAGRAMMATISTS ANALPHABETISMS ANAPHRODISIACS ANASTIGMATISMS ANATOMISATIONS ANELASTICITIES ANGIOSTOMATOUS ANGLICISATIONS ANIMADVERSIONS ANIMALISATIONS ANISODACTYLOUS ANISOMETROPIAS ANNEXATIONISMS ANNEXATIONISTS ANNUITISATIONS ANONYMISATIONS ANTIAGGRESSION ANTIASTHMATICS ANTIBARBARUSES ANTIDEPRESSANT ANTIDESICCANTS ANTIFORMALISMS ANTIFORMALISTS ANTIHARASSMENT ANTIHISTAMINES ANTIMECHANISTS ANTIMETATHESES ANTIMETATHESIS ANTINOMIANISMS ANTIPARASITICS ANTIPERISTASES ANTIPERISTASIS ANTIQUATEDNESS ANTIRITUALISMS ANTISEPARATIST ANTISOCIALISMS ANTISOCIALISTS ANTISPASMODICS ANTONINIANUSES APOCHROMATISMS APOTHEGMATISES APOTHEGMATISTS APPLICABLENESS AQUACULTURISTS ARABICISATIONS ARACHNOLOGISTS ARCHAEOLOGISTS ARISTOCRATISMS AROMATISATIONS ARTHROPLASTIES ARTICULATENESS ARTIFICIALISES ARTIFICIALNESS ASCERTAINMENTS ASSASSINATIONS ASSAULTIVENESS ASSEVERATINGLY ASSIMILABILITY ASSIMILATIVELY ASSISTANTSHIPS ASSOCIATESHIPS ASSOCIATIONISM ASSOCIATIONIST ASSUMABILITIES ASTRAPOPHOBIAS ATTAINABLENESS ATTRACTIVENESS AUDIOCASSETTES AUTHORISATIONS AUTOSCHEDIASMS AUTOSCHEDIAZES AVARICIOUSNESS AVASCULARITIES BACTERIOSTASES BACTERIOSTASIS BACTERISATIONS BALKANISATIONS BALSAMINACEOUS BANDSPREADINGS BARBARISATIONS BARNSBREAKINGS BASTARDISATION BIOSTATISTICAL BIPARTISANISMS BIPARTISANSHIP BLACKGUARDISMS BOUILLABAISSES BRUTALISATIONS BUREAUCRATISES BUREAUCRATISMS BUREAUCRATISTS CAESAROPAPISMS CALAMITOUSNESS CALLIGRAPHISTS CAMPANOLOGISTS CANDIDATESHIPS CANTONISATIONS CARBONISATIONS CARBURISATIONS CARCINOMATOSES CARCINOMATOSIS CARTELISATIONS CASUALISATIONS CASUALIZATIONS CATASTROPHISMS CATASTROPHISTS CATECHISATIONS CAUTERISATIONS CEPHALISATIONS CHARACTERISERS CHARITABLENESS CICATRISATIONS CLASSICALITIES CLASSIFICATION CLASSIFICATORY CLISHMACLAVERS COCAINISATIONS COENAESTHESIAS COLLATERALISES COMPARATIVISTS COMPASSIONABLE COMPASSIONATED COMPASSIONATES CONNATURALISES CONSTABULARIES CONSUBSTANTIAL CONTRABANDISMS CONTRABANDISTS CONTRABASSISTS CONTRARIANISMS CRAFTSMANSHIPS CRYPTAESTHESIA CRYSTALISATION CRYSTALLISABLE DEAMINISATIONS DECAPSULATIONS DECLASSIFIABLE DEMATERIALISES DENATIONALISES DEREALISATIONS DESALINISATION DESQUAMATORIES 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 EMPHATICALNESS ENCAPSULATIONS ENDOPARASITISM ENTHUSIASTICAL EPIGRAMMATISES EPIGRAMMATISMS EPIGRAMMATISTS ERGASTOPLASMIC EUPHAUSIACEANS EXTRAVASATIONS FACTORISATIONS FALLACIOUSNESS FALSIFICATIONS FAMILIARNESSES FARCICALNESSES FASCICULATIONS FATIGUABLENESS FEUDALISATIONS FLAGELLANTISMS FORMALISATIONS FRACTIONALISES FRACTIONALISMS FRACTIONALISTS FRUITARIANISMS GALACTOPOIESES GALACTOPOIESIS GALACTOSAEMIAS GALACTOSAMINES GALACTOSIDASES GALLICISATIONS GALVANISATIONS GALVANOSCOPIES GASTROPLASTIES GERMANISATIONS GLADIATORSHIPS GLAMORISATIONS GLOBALISATIONS GRANDSTANDINGS GRANITISATIONS GRANTSMANSHIPS GYNAECOMASTIAS GYNAECOMASTIES HABERDASHERIES HABITUALNESSES HAEMATOGENESIS HAEMATOLOGISTS HAEMATOPOIESES HAEMATOPOIESIS HAEMODIALYSERS HAGIOGRAPHISTS HAMARTHRITISES HARDINGGRASSES HARMONISATIONS HARUSPICATIONS HAUSSMANNISING HAUSSMANNIZING HEADMASTERSHIP HEXOSAMINIDASE HYALINISATIONS HYALURONIDASES HYPERAESTHESIA 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 LAPAROSCOPISTS LAXATIVENESSES LEMMATISATIONS LIBRARIANSHIPS LINEARISATIONS MAGISTRALITIES MAGISTRATESHIP MAGNETISATIONS MAGNETOSTATICS MAINSTREAMINGS MAJESTICALNESS MALABSORPTIONS MALADMINISTERS MALARIOLOGISTS MANAGERIALISMS MANAGERIALISTS MANIFESTATIONS MANRIKIGUSARIS MARKETISATIONS MARSIPOBRANCHS MARTYRISATIONS MASSIFICATIONS MASSOTHERAPIES MASSOTHERAPIST MASTIGOPHORANS MATERIALNESSES MATHEMATICISES MATHEMATICISMS MATRESFAMILIAS MECHANICALISMS MECHANICALNESS MECHANISATIONS MEDIATISATIONS MEGALOSAURIANS MELODRAMATISES MELODRAMATISTS METAGRABOLISES METALLISATIONS METAPHYSICIANS MICROPARASITES MISALLOCATIONS MISAPPRECIATES MISARTICULATES MISCALCULATORS MISEVALUATIONS MISMANAGEMENTS MISTRANSLATING MISTRANSLATION MUSICALISATION MUTUALISATIONS NARCOCATHARSIS NARCOTISATIONS NARRATOLOGISTS NARROWCASTINGS NECESSARIANISM NECESSITARIANS NEMATODIRIASES NEMATODIRIASIS NEOCAPITALISMS NEOCAPITALISTS NEURAMINIDASES NEURASTHENIACS NONCAPITALISTS NONMAINSTREAMS NONSENSATIONAL NONSTATISTICAL NORMALISATIONS OCCASIONALISMS OCCASIONALISTS OVERDRAMATISES PALATIALNESSES PALEOBOTANISTS PALLETISATIONS PANAESTHETISMS PANARTHRITISES PANCHROMATISMS PANCREATITISES PANGRAMMATISTS PANSEXUALITIES PANSPERMATISMS PANSPERMATISTS PANTISOCRACIES PANTISOCRATIST PAPAPRELATISTS PAPILLOMATOSES PAPILLOMATOSIS PARAMAGNETISMS PARASITISATION PARASITOLOGIES PARASITOLOGIST PARTICULARISES PARTICULARISMS PARTICULARISTS PARTICULARNESS PASSIONATENESS PASTEURISATION PATRESFAMILIAS PATRONISATIONS PAUPERISATIONS PHALANSTERIANS PHALANSTERISMS PHALANSTERISTS PHARMACEUTISTS PHOTOCATALYSIS PHYSHARMONICAS PLASMAPHERESIS PLASTICISATION PLATINISATIONS PLESIOSAURIANS PLURALISATIONS POSTCAPITALIST POSTLAPSARIANS PRIVATISATIONS PROCRASTINATES PROPAGANDISERS PROSOPAGNOSIAS PROSTAGLANDINS PROTOSPATAIRES PSEPHOANALYSIS PSEUDAESTHESIA PSYCHASTHENIAS PSYCHOANALYSIS QUAESTIONARIES QUASIPARTICLES RADIALISATIONS RADIORESISTANT RANDOMISATIONS RATIONALNESSES REACCLIMATISES REACTIONARISMS REACTIONARISTS RECONNAISSANCE REMATERIALISES RENATIONALISES RETRANSLATIONS RHABDOMANTISTS RITUALISATIONS SACCHARIFEROUS SACCHARIMETERS SACCHARINITIES SACCHARISATION SACERDOTALISED SACERDOTALISES SACERDOTALISMS SACERDOTALISTS SACERDOTALIZES SACRALISATIONS SACRALIZATIONS SACRAMENTALISM SACRAMENTALIST SACRAMENTARIES SADOMASOCHISMS SADOMASOCHISTS SALUTARINESSES SANGUINARINESS SANITARIANISMS SANITARINESSES SANITATIONISTS SATISFACTORILY SATURABILITIES SAXIFRAGACEOUS SCANDALISATION SCAPULIMANCIES SCAPULOMANCIES SCARIFICATIONS SCENARISATIONS SCENARIZATIONS SCHEMATISATION SCHISMATICALLY SCHOLASTICALLY SCHOLASTICATES SCLEROMALACIAS SECTARIANISING SECULARISATION SEMASIOLOGICAL SEMIAUTOMATICS SEMICARBAZIDES SEMICARBAZONES SEMIPALMATIONS SEMIPARASITISM SENSATIONALISE SENSATIONALISM SENSATIONALIST SENSATIONALIZE SENSUALISATION SENSUALIZATION SEPARABILITIES SEPARATIONISMS SEPARATIONISTS SEPARATIVENESS SEPTUAGENARIES SERIALISATIONS SERIALIZATIONS SERRATIROSTRAL SESQUIPEDALIAN SEXUALISATIONS SEXUALIZATIONS SHADOWCASTINGS SHADOWGRAPHIES SHAREABILITIES SHERARDISATION SIGNALISATIONS SIGNALIZATIONS SIMAROUBACEOUS SKATEBOARDINGS SOCIALISATIONS SOCIALIZATIONS SPATIALISATION SPECIALISATION SPORADICALNESS SQUANDERMANIAS SQUATTOCRACIES STABILISATIONS STABILIZATIONS STAGECOACHINGS STAINABILITIES STATESMANLIEST STATESMANSHIPS STATIONARINESS STATIONMASTERS STIGMATISATION STOCHASTICALLY STOMATOGASTRIC STRANGULATIONS STRATIGRAPHERS STRATIGRAPHIES STRATIGRAPHIST SUBALLOCATIONS SUBASSOCIATION SUBMANDIBULARS SUBMAXILLARIES SUBSATURATIONS SUBSTANTIALISE SUBSTANTIALISM SUBSTANTIALIST SUBSTANTIALITY SUBSTANTIALIZE SUBSTANTIATING SUBSTANTIATION SUBSTANTIATIVE SUBSTANTIATORS SUBSTANTIVALLY SUFFRAGANSHIPS SULFACETAMIDES SULFANILAMIDES SULFATHIAZOLES SULPHADIAZINES SUMMARISATIONS SUMMARIZATIONS SUOVETAURILIAS SUPERNATATIONS SUPPLANTATIONS SUPRALAPSARIAN SUSTAINABILITY SYLLABICATIONS SYNAPOSEMATISM SYSTEMATICALLY SYSTEMATICIANS TACHYGRAPHISTS TANTALISATIONS TARSOMETATARSI TARTARISATIONS TELANGIECTASES TELANGIECTASIS THANATOLOGISTS THAUMATURGISMS THAUMATURGISTS THEATRICALISES THEATRICALISMS THEATRICALNESS THEMATISATIONS THERMAESTHESIA TRAGICALNESSES TRANSACTINIDES TRANSCALENCIES TRANSCAUCASIAN TRANSCRIPTASES TRANSEXUALISMS TRANSLITERATES TRANSLOCATIONS TRANSMIGRATORS TRANSMISSIONAL TRANSMITTANCES TRANSMUTATIONS TRANSPARENCIES TRANSPARENTISE TRANSPIRATIONS TRANSPLANTINGS TRANSSEXUALISM TRANSSEXUALITY TRANSVERSALITY TRILATERALISMS TRILATERALISTS TRISACCHARIDES TYRANNICALNESS TYRANNOSAURIDS ULTRAROYALISTS UNAVAILINGNESS UNCLASSIFIABLE UNCLASSIFIABLY UNEMBARRASSING UNFASHIONABLES UNICAMERALISMS UNICAMERALISTS UNILATERALISMS UNILATERALISTS UNPLEASANTRIES UNSALABILITIES UNSATISFACTION UNSATISFACTORY UNSECTARIANISM UNSTANDARDISED UNSYSTEMATICAL URALITISATIONS URANOGRAPHISTS VACUOLISATIONS VANDALISATIONS VARIABLENESSES VARIOLISATIONS VASOACTIVITIES VEGETARIANISMS VERBALISATIONS VERNACULARISES VERNACULARISMS VERNACULARISTS VERNALISATIONS VILLAGISATIONS VISUALISATIONS VISUALIZATIONS VOCATIONALISMS VOCATIONALISTS VOLCANISATIONS VRAISEMBLANCES VULCANISATIONS VULGARISATIONS WAPPENSHAWINGS XIPHIPLASTRALS YACHTSMANSHIPS