There are 574 fourteen-letter words containing 2A, N and 2S, https://www.bestwordlist.com/c/a/5/14letterwordswithaanss.htm
ABOMINABLENESS ABORIGINALISMS ABRASIVENESSES ABSTRACTEDNESS ABSTRACTIONISM
ABSTRACTIONIST ABSTRACTNESSES ACCEPTABLENESS ACCIDENTALISMS ACCIDENTALNESS
ACCURATENESSES ACCUSTOMATIONS ACTUALISATIONS ADAPTATIONISTS ADAPTIVENESSES
ADEQUATENESSES ADMEASUREMENTS ADMINISTRATORS ADORABLENESSES ADULARESCENCES
AEROSOLISATION AFFORESTATIONS AFTERSENSATION ALKALESCENCIES AMATEURISHNESS
AMENABLENESSES AMICABLENESSES 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 APOCRYPHALNESS APPARENTNESSES APPLICABLENESS
ARABICISATIONS ARACHNOLOGISTS AROMATISATIONS ARTICULATENESS ARTIFICIALNESS
ASCERTAINMENTS ASSASSINATIONS ASSAULTIVENESS ASSEVERATINGLY ASSISTANTSHIPS
ASSOCIATIONISM ASSOCIATIONIST ATTAINABLENESS ATTRACTIVENESS AUTHORISATIONS
AVARICIOUSNESS AVOWABLENESSES BACKHANDEDNESS BACKWARDNESSES BACTERISATIONS
BALKANISATIONS BALSAMINACEOUS BANCASSURANCES BANDERSNATCHES BANDSPREADINGS
BARBARISATIONS BARNSBREAKINGS BASTARDISATION BEARABLENESSES BIPARTISANISMS
BIPARTISANSHIP BLAMABLENESSES BRUTALISATIONS CADAVEROUSNESS CALAMITOUSNESS
CALCULATEDNESS CAMPANOLOGISTS CANDIDATESHIPS CANTONISATIONS CARBONISATIONS
CARBURISATIONS CARCINOMATOSES CARCINOMATOSIS CARTELISATIONS CASUALISATIONS
CASUALIZATIONS CATECHISATIONS CAUTERISATIONS CEPHALISATIONS CHANGEABLENESS
CHARGEABLENESS CHARITABLENESS CICATRISATIONS CLASSIFICATION COASTGUARDSMAN
COASTGUARDSMEN COCAINISATIONS COENAESTHESIAS COMPARABLENESS COMPASSIONABLE
COMPASSIONATED COMPASSIONATES CONNATURALISES CONNATURALNESS CONSTABULARIES
CONSUBSTANTIAL CONTRABANDISMS CONTRABANDISTS CONTRABASSISTS CONTRABASSOONS
CONTRARIANISMS COUNTERASSAULT CRAFTSMANSHIPS CRYSTALISATION DAMNABLENESSES
DEAMINISATIONS DECAPSULATIONS DENATIONALISES DEREALISATIONS DESALINISATION
DEXAMETHASONES DIABOLICALNESS DIAGNOSTICIANS DIAPHANOUSNESS DIAZOTISATIONS
DISAFFIRMANCES DISAPPEARANCES DISASSOCIATING DISASSOCIATION DISNATURALISED
DISNATURALISES DISNATURALIZES DISPARAGEMENTS DISPENSATIONAL DISPLANTATIONS
DISPLEASANTING DISSERTATIONAL DOGMATICALNESS DOGMATISATIONS DOLLARISATIONS
DRACUNCULIASES DRACUNCULIASIS DRAFTSMANSHIPS DRAMATISATIONS EMBARRASSINGLY
EMBARRASSMENTS EMPHATICALNESS ENCAPSULATIONS ENDOPARASITISM ENTHUSIASTICAL
ENTOMOSTRACANS EUPHAUSIACEANS EXTRAVASATIONS FACTORISATIONS FALLACIOUSNESS
FALSIFICATIONS FAMILIARNESSES FARCICALNESSES FASCICULATIONS FATIGUABLENESS
FAVOURABLENESS FEUDALISATIONS FLAGELLANTISMS FLAGRANTNESSES FORMALISATIONS
FRACTIONALISES FRACTIONALISMS FRACTIONALISTS FRAGRANTNESSES FRUITARIANISMS
GALACTOSAMINES GALLICISATIONS GALVANISATIONS GALVANOSCOPIES GERMANISATIONS
GLAMORISATIONS GLOBALISATIONS GRADABLENESSES GRANDSTANDINGS GRANITISATIONS
GRANTSMANSHIPS GYNAECOMASTIAS GYNAECOMASTIES HABITUALNESSES HAEMATOGENESES
HAEMATOGENESIS HARDHANDEDNESS HARDHEADEDNESS HARDINGGRASSES HARMONISATIONS
HARUSPICATIONS HAUSSMANNISING HAUSSMANNIZING HEXOSAMINIDASE HYALINISATIONS
HYALURONIDASES HYPERAWARENESS IMAGINABLENESS IMMACULATENESS IMMATERIALNESS
IMMUNOASSAYIST IMPASSABLENESS IMPLACABLENESS INACCURATENESS INADEQUATENESS
INCAPSULATIONS INSANITARINESS INSATIABLENESS INSTANTIATIONS INTRANSIGEANTS
INTRAVASATIONS INVALUABLENESS INVARIABLENESS IRRATIONALISES IRRATIONALISMS
IRRATIONALISTS IRRATIONALNESS ISOALLOXAZINES ITALICISATIONS JARGONISATIONS
LABIALISATIONS LAMENTABLENESS LAUDABLENESSES LAXATIVENESSES LEMMATISATIONS
LIBRARIANSHIPS LINEARISATIONS MAGNETISATIONS MAGNETOSTATICS MAINSTREAMINGS
MAJESTICALNESS MALABSORPTIONS MALACOSTRACANS MALADJUSTMENTS MALADMINISTERS
MALAPERTNESSES MANAGEABLENESS MANAGERIALISMS MANAGERIALISTS MANIFESTATIONS
MANRIKIGUSARIS MARKETABLENESS MARKETISATIONS MARSIPOBRANCHS MARTYRISATIONS
MASSIFICATIONS MASTIGOPHORANS MATERIALNESSES MEASURABLENESS MECHANICALISMS
MECHANICALNESS MECHANISATIONS MEDIATISATIONS MEGALOSAURIANS METALLISATIONS
METAPHYSICIANS MISALLOCATIONS 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 PALATIALNESSES PALEOBOTANISTS PALLETISATIONS PALPABLENESSES
PANAESTHETISMS PANARTHRITISES PANCHROMATISMS PANCREATITISES PANGRAMMATISTS
PANSEXUALITIES PANSPERMATISMS PANSPERMATISTS PANTISOCRACIES PANTISOCRATIST
PARAMAGNETISMS PARAMENSTRUUMS PARANTHROPUSES PARASITISATION PARDONABLENESS
PARTICULARNESS PASSABLENESSES PASSIONATENESS PASTEURISATION PASTORALNESSES
PATRONISATIONS PAUPERISATIONS PHALANSTERIANS PHALANSTERISMS PHALANSTERISTS
PHYSHARMONICAS PLACABLENESSES PLASTICISATION PLATINISATIONS PLEASANTNESSES
PLESIOSAURIANS PLURALISATIONS POSTLAPSARIANS POSTMENOPAUSAL PRIVATISATIONS
PROCRASTINATES PROPAGABLENESS PROPAGANDISERS PROSOPAGNOSIAS PROSTAGLANDINS
PSEPHOANALYSES PSEPHOANALYSIS PSYCHASTHENIAS PSYCHOANALYSED PSYCHOANALYSER
PSYCHOANALYSES PSYCHOANALYSIS PSYCHOANALYSTS PSYCHOANALYZES QUAESTIONARIES
RADIALISATIONS RADIORESISTANT RAMPAGEOUSNESS RANDOMISATIONS RATEABLENESSES
RATIONALNESSES REACTIONARISMS REACTIONARISTS READABLENESSES REASONABLENESS
RECONNAISSANCE REMARKABLENESS RENATIONALISES RESTAURANTEURS RETRANSLATIONS
REWARDABLENESS RHABDOMANTISTS RITUALISATIONS SACCHARINITIES SACCHARISATION
SACRALISATIONS SACRALIZATIONS SACRAMENTALISM SACRAMENTALIST SACRAMENTARIES
SACROSANCTNESS SALEABLENESSES SALUTARINESSES SALVABLENESSES SANGUINARINESS
SANITARIANISMS SANITARINESSES SANITATIONISTS SAVEABLENESSES SCALABLENESSES
SCANDALISATION SCANDALMONGERS SCANDALOUSNESS SCAPULIMANCIES SCAPULOMANCIES
SCARIFICATIONS SCENARISATIONS SCENARIZATIONS SCHEMATISATION SEASONABLENESS
SEASONALNESSES SECTARIANISING SECULARISATION SEMICARBAZONES SEMIPALMATIONS
SENSATIONALISE SENSATIONALISM SENSATIONALIST SENSATIONALIZE SENSUALISATION
SENSUALIZATION SEPARATENESSES SEPARATIONISMS SEPARATIONISTS SEPARATIVENESS
SEPTUAGENARIES SERIALISATIONS SERIALIZATIONS SESQUIPEDALIAN SEXUALISATIONS
SEXUALIZATIONS SHADOWCASTINGS SHAMEFACEDNESS SHERARDISATION SIGNALISATIONS
SIGNALIZATIONS SKATEBOARDINGS SOCIALISATIONS SOCIALIZATIONS SOMNAMBULANCES
SOMNAMBULATORS SPATIALISATION SPECIALISATION SPORADICALNESS SQUANDERMANIAS
STABILISATIONS STABILIZATIONS STAGECOACHINGS STAINABILITIES STALWARTNESSES
STATESMANLIEST STATESMANSHIPS STATIONARINESS STATIONMASTERS STIGMATISATION
STRANGULATIONS STRATOVOLCANOS SUBALLOCATIONS SUBAPPEARANCES SUBASSOCIATION
SUBMANDIBULARS SUBSATURATIONS SUBSTANTIALISE SUBSTANTIALISM SUBSTANTIALIST
SUBSTANTIALITY SUBSTANTIALIZE SUBSTANTIATING SUBSTANTIATION SUBSTANTIATIVE
SUBSTANTIATORS SUBSTANTIVALLY SUFFRAGANSHIPS SULFANILAMIDES SULPHADIAZINES
SUMMARISATIONS SUMMARIZATIONS SUPERNATATIONS SUPPLANTATIONS SUPRALAPSARIAN
SUPRASEGMENTAL SUSTAINABILITY SYLLABICATIONS SYNAPOSEMATISM SYSTEMATICIANS
TAMEABLENESSES TANTALISATIONS TARTARISATIONS TELANGIECTASES TELANGIECTASIS
TETRAGONALNESS THANATOLOGISTS THEATRICALNESS THEMATISATIONS THREADBARENESS
TRAGICALNESSES TRANSACTINIDES TRANSCALENCIES TRANSCAUCASIAN TRANSCRIPTASES
TRANSCUTANEOUS TRANSEXUALISMS TRANSLITERATES TRANSLOCATIONS TRANSMIGRATORS
TRANSMISSIONAL TRANSMITTANCES TRANSMUTATIONS TRANSPARENCIES TRANSPARENTISE
TRANSPIRATIONS TRANSPLANTINGS TRANSPORTANCES TRANSSEXUALISM TRANSSEXUALITY
TRANSVERSALITY TYRANNICALNESS TYRANNOSAURIDS 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 VEGETARIANISMS VERBALISATIONS VERNACULARISES
VERNACULARISMS VERNACULARISTS VERNALISATIONS VILLAGISATIONS VISUALISATIONS
VISUALIZATIONS VOCATIONALISMS VOCATIONALISTS VOLCANISATIONS VRAISEMBLANCES
VULCANISATIONS VULGARISATIONS WAPPENSHAWINGS YACHTSMANSHIPS