There are 435 fifteen-letter words containing A, B, 2I and S, https://www.bestwordlist.com/c/a/5/15letterwordswithabiis.htm
ABORIGINALITIES ABSORBABILITIES ABSTRACTIONISMS ABSTRACTIONISTS
ACCEPTABILITIES ACCESSIBILITIES ACQUIRABILITIES ACTINOBIOLOGIES
ADJUSTABILITIES ADMISSIBILITIES ADSORBABILITIES AFFECTABILITIES
AFFORDABILITIES AGRIBUSINESSMAN AGRIBUSINESSMEN ALPHABETISATION
AMBIDEXTERITIES AMBISEXUALITIES AMBITIOUSNESSES ANALYSABILITIES
ANALYZABILITIES ANSWERABILITIES ANTIABORTIONIST ANTIFASHIONABLE
ANTIFILIBUSTERS ANTILIBERALISMS ANTIMETABOLITES ANTIREPUBLICANS
ANTITHROMBOTICS APPEALABILITIES APPLICABILITIES ARBITRARINESSES
ARBORICULTURIST ARIBOFLAVINOSES ARIBOFLAVINOSIS ASSIGNABILITIES
ASSOCIABILITIES ASTROBIOLOGISTS ATRABILIOUSNESS ATTAINABILITIES
ATTRIBUTIVENESS AUTOBIOGRAPHIES AUTOSTABILITIES BACCHANALIANISM
BACTERIOLOGISTS BACTERIOPHAGIES BASIDIOMYCETOUS BASTARDISATIONS
BASTARDIZATIONS BEAUTIFICATIONS BELIEVABILITIES BENZODIAZEPINES
BIBLIOTHECARIES BIBLIOTHERAPIES BIDIALECTALISMS BIOACOUSTICIANS
BIOASTRONAUTICS BIOCONTAINMENTS BIODEGRADATIONS BIOEQUIVALENCES
BIOGEOCHEMICALS BIOREGIONALISMS BIOREGIONALISTS BIOREMEDIATIONS
BIOSTATISTICIAN BIOSTRATIGRAPHY BIOSYSTEMATISTS BIPARTISANSHIPS
BIPOLARISATIONS BIPOLARIZATIONS BISYMMETRICALLY BITUMINISATIONS
BITUMINIZATIONS BLAXPLOITATIONS BOUGAINVILLAEAS BOWDLERISATIONS
BOWDLERIZATIONS BRACHYPINAKOIDS BRAINSICKNESSES BREATHABILITIES
BREATHARIANISMS BRILLIANTNESSES BUREAUCRATISING CALCULABILITIES
CANNIBALISATION CENSURABILITIES CHAMBERLAINSHIP CHANGEABILITIES
CHARGEABILITIES CIRCUMAMBAGIOUS CIRCUMAMBIENCES CIRCUMSCRIBABLE
COAGULABILITIES CODIFIABILITIES COLOURABILITIES COMBINABILITIES
COMMUTABILITIES COMPARABILITIES COMPATIBILITIES COMPUTABILITIES
CONFUSABILITIES CONSCIONABILITY CREDITABILITIES CRUCIVERBALISMS
CRUCIVERBALISTS CULTIVABILITIES DAMAGEABILITIES DECARBONISATION
DECARBURISATION DECEIVABILITIES DECOMPOSABILITY DEFEASIBILITIES
DEFIBRILLATIONS DEFORMABILITIES DEGRADABILITIES DELECTABILITIES
DEMOBILISATIONS DEMOBILIZATIONS DEMONSTRABILITY DEPENDABILITIES
DEPLORABILITIES DESPICABILITIES DESTABILISATION DESTABILIZATION
DETACHABILITIES DETECTABILITIES DETERRABILITIES DETESTABILITIES
DETRIBALISATION DIALYSABILITIES DIALYZABILITIES DISAGREEABILITY
DISAMBIGUATIONS DISAPPROBATIONS DISATTRIBUTIONS DISEMBARKATIONS
DISEMBARRASSING DISEQUILIBRATED DISEQUILIBRATES DISESTABLISHING
DISHABILITATING DISHABILITATION DISPOSABILITIES DISPUTABILITIES
DISREPUTABILITY DISSOCIABLENESS DISSYLLABIFYING DISTINGUISHABLE
DISTINGUISHABLY DISTRACTIBILITY DORSIBRANCHIATE DUPLICABILITIES
EBULLIOSCOPICAL EBURNIFICATIONS EDUCATABILITIES ELIMINABILITIES
EMPLOYABILITIES ENUMERABILITIES EVAPORABILITIES EXAMINABILITIES
EXCLUDABILITIES EXPANDABILITIES EXPANSIBILITIES EXPENDABILITIES
EXPORTABILITIES EXTENDABILITIES EXTRUDABILITIES FACTORABILITIES
FIBROCARTILAGES FILTERABILITIES FORMIDABILITIES GERMINABILITIES
GINGERBREADIEST GOVERNABILITIES GYROSTABILISERS GYROSTABILIZERS
HEMOGLOBINURIAS HIBERNICISATION HISTOCOMPATIBLE HONOURABILITIES
HYPNOTISABILITY ILLIBERALNESSES ILLIMITABLENESS IMMEASURABILITY
IMMEDICABLENESS IMMENSURABILITY IMMOBILISATIONS IMMOBILIZATIONS
IMMOVEABILITIES IMPALPABILITIES IMPARTIBILITIES IMPASSABILITIES
IMPASSIBILITIES IMPECCABILITIES IMPERISHABILITY IMPERTURBATIONS
IMPERVIABLENESS IMPLACABILITIES IMPLAUSIBLENESS IMPORTABILITIES
IMPROBABILITIES IMPROVABILITIES INACCESSIBILITY INADMISSIBILITY
INADVISABLENESS INALIENABLENESS INAPPREHENSIBLE INAUDIBLENESSES
INCONSOLABILITY INCULPABILITIES INDEFEASIBILITY INDEFINABLENESS
INDIGESTABILITY INDISCIPLINABLE INDISPUTABILITY INDISTRIBUTABLE
INDOMITABLENESS INDUBITABLENESS INEDUCABILITIES INEQUITABLENESS
INESTIMABLENESS INEVITABILITIES INEXORABILITIES INFALLIBILITIES
INFEASIBILITIES INFRANGIBLENESS INHERITABLENESS INIMITABILITIES
INOCULABILITIES INOPERABILITIES INSATIABILITIES INSCRIBABLENESS
INSOCIABILITIES INSOLVABILITIES INSUBORDINATELY INSUBORDINATION
INSUBSTANTIALLY INTANGIBILITIES INTEGRABILITIES INTERBEHAVIOURS
INTRANSMISSIBLE INVARIABILITIES INVIOLABILITIES IRASCIBLENESSES
IRRECONCILABLES IRRESISTABILITY IRRESOLVABILITY IRRITABLENESSES
JUSTIFIABLENESS LABYRINTHITISES LIBERALISATIONS LIBERALIZATIONS
LIBERTARIANISMS LIMITABLENESSES LISTENABILITIES MACHINABILITIES
MALDISTRIBUTION MANAGEABILITIES MARKETABILITIES MEASURABILITIES
MENSURABILITIES METABISULPHITES METAGRABOLISING METAGROBOLISING
METASTABILITIES MISATTRIBUTIONS MISTRANSCRIBING MODIFIABILITIES
MONOSYLLABICITY NANOPUBLISHINGS NEGOTIABILITIES NONDURABILITIES
NONSAPONIFIABLE NOTICEABILITIES NUDIBRANCHIATES OBSERVABILITIES
OBTAINABILITIES OVERAMBITIOUSLY OVERSTABILITIES PALAEBIOLOGISTS
PALAEOBIOLOGIES PALAEOBIOLOGIST PALEOBIOLOGISTS PARABOLISATIONS
PARABOLIZATIONS PATENTABILITIES PENETRABILITIES PERDURABILITIES
PERFECTIBILIANS PERISHABILITIES PERISSOSYLLABIC PERMUTABILITIES
POLYSYLLABICISM PONDERABILITIES PREDICABILITIES PREESTABLISHING
PREFABRICATIONS PREFERABILITIES PREPUBLICATIONS PRESBYTERIANISE
PRESBYTERIANISM PRESBYTERIANIZE PROBABILIORISMS PROBABILIORISTS
PROBATIONERSHIP PROFITABILITIES PROMOTABILITIES PROPAGABILITIES
PROVERBIALISING PUNISHABILITIES QUADRISYLLABICS QUESTIONABILITY
QUODLIBETARIANS RADIOBIOLOGISTS REALISABILITIES REALIZABILITIES
REASONABILITIES RECALLABILITIES RECEIVABILITIES RECOGNISABILITY
RECYCLABILITIES REDEEMABILITIES REFORMABILITIES REFUNDABILITIES
REHABILITATIONS REMARKABILITIES REMEDIABILITIES REMOBILISATIONS
REMOBILIZATIONS REPAIRABILITIES REPEATABILITIES REPLICABILITIES
REPUBLICANISING RESECTABILITIES RESOLVABILITIES RESPECTABILISED
RESPECTABILISES RESPECTABILIZED RESPECTABILIZES RESPIRABILITIES
RESTABILIZATION RETURNABILITIES REVEALABILITIES SABERMETRICIANS
SCRATCHBUILDING SCRIBACIOUSNESS SEARCHABILITIES SEASONABILITIES
SEMIABSTRACTION SINTERABILITIES SKETCHABILITIES SOCIOBIOLOGICAL
SOLDERABILITIES SOLUBILISATIONS SOLUBILIZATIONS SPREADABILITIES
SQUEEZABILITIES STRIKEBREAKINGS STROBILISATIONS STROBILIZATIONS
SUBASSOCIATIONS SUBCATEGORISING SUBCATEGORIZING SUBCIVILISATION
SUBCIVILIZATION SUBINFEUDATIONS SUBINSINUATIONS SUBLAPSARIANISM
SUBMINIATURISED SUBMINIATURISES SUBMINIATURIZED SUBMINIATURIZES
SUBOPTIMISATION SUBOPTIMIZATION SUBORGANISATION SUBORGANIZATION
SUBSPECIALISING SUBSPECIALITIES SUBSPECIALIZING SUBSPECIFICALLY
SUBSTANTIALISED SUBSTANTIALISES SUBSTANTIALISMS SUBSTANTIALISTS
SUBSTANTIALIZED SUBSTANTIALIZES SUBSTANTIATIONS SUBSTANTIVISING
SUBSTANTIVITIES SUBSTANTIVIZING SUBSTITUTIONARY SUBURBANISATION
SUBURBANIZATION SUBVERSIONARIES SUBVOCALISATION SUBVOCALIZATION
SURVIVABILITIES SYLLABIFICATION SYMBOLISTICALLY TABULARISATIONS
TABULARIZATIONS TEMPERABILITIES TERMINABILITIES TETRABASICITIES
THERMOSTABILITY TINTINNABULATES TRANSFERABILITY TRANSLATABILITY
TRANSMUTABILITY TRANSPOSABILITY TRIBUTARINESSES TRISYLLABICALLY
TUBERCULISATION UBIQUITARIANISM UBIQUITINATIONS ULTRALIBERALISM
UNANSWERABILITY UNASSAILABILITY UNDISCIPLINABLE UNIVERSALISABLE
UNIVERSALIZABLE UNKNOWABILITIES UNREADABILITIES UNRELIABILITIES
UNSALEABILITIES UNSOCIABILITIES UNSUITABILITIES UNTRANSMISSIBLE
UNWORKABILITIES UPGRADABILITIES VAPOURABILITIES VERIFIABILITIES
VIBROFLOTATIONS VINDICABILITIES VULNERABILITIES