There are 453 twelve-letter words containing A, B, 2E and I, https://www.bestwordlist.com/c/a/5/12letterwordswithabeei.htm
ABBREVIATURE ABECEDARIANS ABHORRENCIES ABORTIVENESS ABRASIVENESS
ABRIDGEMENTS ABSENTEEISMS ABSENTMINDED ABSORBENCIES ABSTINENCIES
ACCREDITABLE ACCUMBENCIES ADVERBIALISE ADVERBIALIZE AEROEMBOLISM
AGREEABILITY ALPHABETISED ALPHABETISER ALPHABETISES ALPHABETIZED
ALPHABETIZER ALPHABETIZES AMBIVALENCES AMICABLENESS AMINOBUTENES
AMPHISBAENAE ANAEROBIOSES ANGLEBERRIES ANNABERGITES ANTIFEBRILES
ANTIMETABOLE ARBITREMENTS ARQUEBUSIERS BACKSPEERING BACTERAEMIAS
BACTERICIDES BACTERIOCIDE BADDELEYITES BAKSHEESHING BALLADEERING
BALLSINESSES BALNEOLOGIES BANDEIRANTES BANDERILLERO BAPTISTERIES
BARAESTHESIA BARESTHESIAS BARQUENTINES BARYOGENESIS BASTNAESITES
BATHOMETRIES BATHYMETRIES BATTLEFIELDS BATTLEPIECES BAULKINESSES
BEAUJOLAISES BEAUTIFULLER BEETLEBRAINS BEGGARLINESS BELEAGUERING
BENEFACTIONS BENEFICIALLY BENEFICIATED BENEFICIATES BENIGNANCIES
BEPLASTERING BERTILLONAGE BESCATTERING BESPATTERING BESTIALITIES
BETWEENBRAIN BIBLIOTHECAE BICENTENNIAL BIDDABLENESS BIFLAGELLATE
BIGHEARTEDLY BIOFEEDBACKS BIOGENETICAL BIOSATELLITE BIPEDALITIES
BLACKBERRIED BLACKBERRIES BLATHERSKITE BLEACHERITES BLEARINESSES
BLETHERATION BOILERMAKERS BOILERPLATED BOILERPLATES BOKMAKIERIES
BOULEVARDIER BRAAIVLEISES BRAININESSES BRAINTEASERS BRASHINESSES
BRASSINESSES BRATTINESSES BRAWNINESSES BREADBERRIES BREADWINNERS
BREVIPENNATE BRIDEMAIDENS BRIDEWEALTHS BUCCANEERING BUCCANEERISH
CABINETMAKER CANTERBURIES CARRIAGEABLE CELEBRATIONS CELEBREALITY
CEREBRALISMS CEREBRALISTS CEREBRATIONS CEREBROTONIA CHINABERRIES
COMMISERABLE CONSIDERABLE CORALBERRIES CRABBINESSES CRACKBERRIES
CRAKEBERRIES CYBERNETICAL DEATTRIBUTED DEATTRIBUTES DEBAUCHERIES
DEBILITATIVE DEBONAIRNESS DECARBONISED DECARBONISER DECARBONISES
DECARBONIZED DECARBONIZER DECARBONIZES DECARBURISED DECARBURISES
DECARBURIZED DECARBURIZES DECIPHERABLE DEFIBRILLATE DEFIBRINATED
DEFIBRINATES DELIBERATELY DELIBERATING DELIBERATION DELIBERATIVE
DELIBERATORS DELIVERABLES DESTABILISED DESTABILISER DESTABILISES
DESTABILIZED DESTABILIZER DESTABILIZES DETERMINABLE DETERMINABLY
DETRIBALISED DETRIBALISES DETRIBALIZED DETRIBALIZES DEVERBATIVES
DIABETOGENIC DIAGNOSEABLE DISABLEMENTS DISAGREEABLE DISAGREEABLY
DISASSEMBLED DISASSEMBLER DISASSEMBLES DISCOVERABLE DISEMBRANGLE
DISPLACEABLE DISREPUTABLE DISSEMBLANCE DOMESTICABLE DRABBINESSES
DYEABILITIES ECCALEOBIONS ELECTABILITY EMBLAZONRIES EMBLEMATICAL
EMBLEMATISED EMBLEMATISES EMBLEMATISTS EMBLEMATIZED EMBLEMATIZES
EMETOPHOBIAS EMULSIFIABLE ENTEROBIASES ENTEROBIASIS ENVIABLENESS
EPHEBOPHILIA EQUABILITIES EQUIBALANCED EQUIBALANCES EQUILIBRATED
EQUILIBRATES EQUIPROBABLE ESTABLISHERS EXACERBATING EXACERBATION
EXORBITANCES EXPROBRATIVE EXPROPRIABLE EXTERMINABLE EXTRADITABLE
EXUBERANCIES FALLIBLENESS FEASIBLENESS FEATHERBRAIN FEBRIFACIENT
FERTILISABLE FERTILIZABLE FIBERGLASSED FIBERGLASSES FIBREGLASSED
FIBREGLASSES FINEABLENESS FLABBINESSES GABERLUNZIES GINGERBREADS
GINGERBREADY GLOBIGERINAE GREENBACKISM GRIDDLEBREAD HARQUEBUSIER
HEATHBERRIES HEBEPHRENIAC HEBEPHRENIAS IDENTIFIABLE ILLIBERALISE
ILLIBERALIZE IMITABLENESS IMMEASURABLE IMMENSURABLE IMPENETRABLE
IMPENETRABLY IMPERFORABLE IMPERISHABLE IMPIERCEABLE IMPONDERABLE
INABSTINENCE INACCESSIBLE INAPPEASABLE INAPPELLABLE INDECLINABLE
INDEFEASIBLE INDEFEASIBLY INDEFINABLES INDETECTABLE INEFFACEABLE
INEFFACEABLY INELABORATED INELABORATES INERADICABLE INEXECUTABLE
INEXPANSIBLE INEXPLICABLE INEXPUGNABLE INEXTIRPABLE INEXTRICABLE
INOBSERVABLE INOBSERVANCE INSEPARABLES INSUFFERABLE INTERMINABLE
INTERPOLABLE INTERPOSABLE INTERROGABLE INVERTEBRATE INVESTIGABLE
INVIABLENESS INVULNERABLE IRREALISABLE IRREALIZABLE IRREBUTTABLE
IRREDEEMABLE IRREDEEMABLY IRREFORMABLE IRREFRAGABLE IRRELIEVABLE
IRREMEDIABLE IRREMEDIABLY IRREPAIRABLE IRREPEALABLE IRREPEALABLY
IRREPROVABLE IRRESISTABLE IRRESOLVABLE IRRESPIRABLE JAILBREAKERS
JETTISONABLE KNEEBOARDING LANGBEINITES LIABLENESSES LIBERALISERS
LIBERALITIES LIBERALIZERS LIBERTINAGES LIKEABLENESS LIVEABLENESS
LOGANBERRIES MAGNETISABLE MAGNETIZABLE MANIFESTABLE MANIFESTIBLE
MARRIAGEABLE MARSHBERRIES MECHANISABLE MECHANIZABLE MISASSEMBLED
MISASSEMBLES NANNYBERRIES OBEDIENTIARY OBJECTIVATED OBJECTIVATES
OBLITERATIVE OBSERVANCIES OLALLIEBERRY PARABLEPSIES PASSIBLENESS
PERMEABILITY PERTURBATIVE PICKELHAUBES PITIABLENESS PLEBEIANISED
PLEBEIANISES PLEBEIANISMS PLEBEIANIZED PLEBEIANIZES PREBENDARIES
PRECIPITABLE PREDIABETICS PREESTABLISH PREFABRICATE PRESBYTERIAL
PRESBYTERIAN PROBLEMATIZE PROPHESIABLE PULVERISABLE PULVERIZABLE
QUESTIONABLE RADIOLABELED RATBAGGERIES REASSEMBLIES REASSEMBLING
REATTRIBUTED REATTRIBUTES RECALIBRATED RECALIBRATES RECOGNISABLE
RECOGNIZABLE RECONCILABLE REGISTERABLE REHABILITATE REIMBURSABLE
RELIABLENESS RELUBRICATED RELUBRICATES RENEGOTIABLE RENEWABILITY
REPLEVISABLE RESTABILISED RESTABILISES RESTABILIZED RESTABILIZES
RESTRAINABLE RESUSCITABLE RIBONUCLEASE ROWANBERRIES RUBEFACIENTS
SABERMETRICS SCABBINESSES SCALDBERRIES SCRIEVEBOARD SEDIMENTABLE
SEMIARBOREAL SEMIBASEMENT SEVERABILITY SEWABILITIES SHABBINESSES
SINGABLENESS SIZEABLENESS SLABBINESSES SOCIABLENESS SORBEFACIENT
SPEEDBALLING SPEEDBOATING STERILISABLE STERILIZABLE STICKYBEAKED
STRAWBERRIES SUBCELESTIAL SUBDEANERIES SUBEPIDERMAL SUBINFEUDATE
SUBJACENCIES SUBLITERATES SUBSATELLITE SUBTENANCIES SUBVARIETIES
SUEABILITIES SUGARBERRIES SUITABLENESS SUPERCABINET TALEBEARINGS
TANGIBLENESS TELEBANKINGS TENABILITIES TERBUTALINES TEREBRATIONS
THERMOLABILE TRAILBREAKER TRAINBEARERS UNACHIEVABLE UNASCENDIBLE
UNBELIEVABLE UNBELIEVABLY UNBENEFICIAL UNBESPEAKING UNBIASEDNESS
UNBRIDGEABLE UNCREDITABLE UNDECEIVABLE UNDELIBERATE UNDERBEARING
UNDESIRABLES UNFILTERABLE UNLISTENABLE UNNEGOTIABLE UNNOTICEABLE
UNPERISHABLE UNREALISABLE UNREALIZABLE UNRELIEVABLE UNREPAIRABLE
UNREVIEWABLE UNRIDDLEABLE UNVERBALISED UNVERBALIZED UNVERIFIABLE
USEABILITIES VARIABLENESS VEGETABLIEST VENERABILITY VERBERATIONS
VERBIGERATED VERBIGERATES VERTEBRATION VIOLABLENESS VOIDABLENESS
WABBLINESSES WAMBLINESSES WINDBREAKERS