There are 473 twelve-letter words containing A, 2I and Z, https://www.bestwordlist.com/c/a/4/12letterwordswithaiiz.htm
ABSOLUTIZING ACCLIMATIZED ACCLIMATIZER ACCLIMATIZES ADULTERIZING
ADVERBIALIZE ADVERTIZINGS AEROBICIZING AEROSOLIZING AESTHETICIZE
AGGRANDIZING ALBUMENIZING ALBUMINIZING ALCOHOLIZING ALDOLIZATION
ALKALINIZING ALLEGORIZING AMINOBENZOIC AMORTIZATION ANABAPTIZING
ANODIZATIONS ANTAGONIZING ANTISYZYGIES APOSTATIZING APOSTOLIZING
APPETIZINGLY ARABIZATIONS ARBORIZATION ARTERIALIZED ARTERIALIZES
ASEPTICIZING ASSOILZIEING ATOMIZATIONS ATTITUDINIZE AUDIBILIZING
AUTOMATIZING AUTOTOMIZING AXIOMATIZING AZATHIOPRINE BANALIZATION
BASTARDIZING BESTIALIZING BILHARZIASES BILHARZIASIS BILHARZIOSES
BILHARZIOSIS BIOGRAPHIZED BIOGRAPHIZES BIPOLARIZING BLIZZARDIEST
BURGLARIZING CANALIZATION CANISTERIZED CANISTERIZES CANNIBALIZED
CANNIBALIZES CANONIZATION CAPERCAILZIE CAPITALIZING CARAMELIZING
CATABOLIZING CATALOGIZING CATECHIZINGS CATEGORIZING CATHOLICIZED
CATHOLICIZES CENTRALIZING CHANNELIZING CHAPTALIZING CHORIZATIONS
CINEMATIZING CINNARIZINES CIRCULARIZED CIRCULARIZER CIRCULARIZES
CIVILIANIZED CIVILIANIZES CIVILIZATION CLASSICIZING COLONIALIZED
COLONIALIZES COLONIZATION COLORIZATION CONTAINERIZE CORDIALIZING
CREOLIZATION CRIMINALIZED CRIMINALIZES CRITICIZABLE CRYSTALIZING
CURARIZATION CUTINIZATION CYCLIZATIONS DECAPITALIZE DECIMALIZING
DEHUMANIZING DEIONIZATION DELOCALIZING DEMILITARIZE DEMINERALIZE
DEMONIZATION DEMORALIZING DENATURIZING DEPOLARIZING DEPUTIZATION
DERACIALIZED DERACIALIZES DERIVATIZING DESALINIZING DESTABILIZED
DESTABILIZER DESTABILIZES DESTIGMATIZE DETRIBALIZED DETRIBALIZES
DEVALORIZING DEVITALIZING DEVOCALIZING DIAGONALIZED DIAGONALIZES
DIALYZATIONS DIGITALIZING DIGITIZATION DIMERIZATION DIPLOMATIZED
DIPLOMATIZES DISAUTHORIZE DISHARMONIZE DISORGANIZED DISORGANIZER
DISORGANIZES DISPAUPERIZE DISSOCIALIZE DIVINIZATION DOCKIZATIONS
EARLIERIZING EDITORIALIZE ELASTICIZING EMBOLIZATION EMOTIONALIZE
ENERGIZATION ENIGMATIZING EQUALIZATION EROTIZATIONS ESSENTIALIZE
ESTERIZATION ETERNALIZING ETERNIZATION ETHERIZATION EVANGELIZING
FACTIONALIZE FAMILIARIZED FAMILIARIZER FAMILIARIZES FANATICIZING
FARADIZATION FEDERALIZING FEMINIZATION FERTILIZABLE FIBERIZATION
FICTIONALIZE FINALIZATION FLUIDIZATION FOCALIZATION FOSSILIZABLE
FRACTIONIZED FRACTIONIZES FRANCIZATION FRATERNIZING FUSTIANIZING
GELATINIZERS GELATINIZING GENERALIZING GLAMOURIZING GOLIATHIZING
GORMANDIZING GRAMMATICIZE GRANGERIZING GRAPHITIZING GRECIANIZING
HANSARDIZING HEATHENIZING HEBRAIZATION HEPARINIZING HEPATIZATION
HIERARCHIZED HIERARCHIZES HISPANICIZED HISPANICIZES HISPANIOLIZE
HOMINIZATION HOSPITALIZED HOSPITALIZES HUMANIZATION HYBRIDIZABLE
IDEALIZATION IDOLATRIZERS IDOLATRIZING IDOLIZATIONS ILLEGALIZING
ILLIBERALIZE IMMORTALIZED IMMORTALIZER IMMORTALIZES IMMUNIZATION
IMPERIALIZED IMPERIALIZES INCOGNIZABLE INCOGNIZANCE INFAMONIZING
INFANTILIZED INFANTILIZES INFORMATIZED INFORMATIZES INITIALIZING
INTERNALIZED INTERNALIZES IRIDIZATIONS IRREALIZABLE ISOENZYMATIC
ITALIANIZING ITEMIZATIONS JEOPARDIZING JOURNALIZING KERATINIZING
KYANIZATIONS LAICIZATIONS LAMINARIZING LATERALIZING LATERIZATION
LATINIZATION LEGALIZATION LEGITIMATIZE LETHARGIZING LEXICALIZING
LIBERALIZERS LIBERALIZING LIONIZATIONS LITERALIZERS LITERALIZING
LOCALIZATION MACADAMIZING MADERIZATION MARGINALIZED MARGINALIZES
MARZIPANNING MASCULINIZED MASCULINIZES MATERIALIZED MATERIALIZER
MATERIALIZES MAXIMIZATION MEDICALIZING MELANIZATION MEMORIALIZED
MEMORIALIZER MEMORIALIZES MEMORIZATION MERCURIALIZE METABOLIZING
METALIZATION MILITARIZING MINERALIZERS MINERALIZING MINERALOGIZE
MINIATURIZED MINIATURIZES MINIMIZATION MISEMPHASIZE MISSIONARIZE
MITHRIDATIZE MOBILIZATION MONARCHIZING MONETIZATION MORALIZATION
MOTORIZATION MUNICIPALIZE MUSICALIZING MUTAGENIZING NASALIZATION
NATIONALIZED NATIONALIZER NATIONALIZES NATURALIZING NAZIFICATION
NEBULIZATION NEUTRALIZING NOMADIZATION NOMINALIZING NOTARIZATION
NOVELIZATION NUCLEARIZING OPSONIZATION OPTIMALIZING OPTIMIZATION
ORGANIZATION ORIENTALIZED ORIENTALIZES OVERIDEALIZE OXIDIZATIONS
OZONISATIONS OZONIZATIONS PAGANIZATION PALATALIZING PANEGYRIZING
PARABOLIZING PARALOGIZING PARASITIZING PAROCHIALIZE PARTIALIZING
PARTIZANSHIP PASTEURIZING PATRIALIZING PECTIZATIONS PECULIARIZED
PECULIARIZES PEDANTICIZED PEDANTICIZES PENALIZATION PEPTIZATIONS
PHYSICALIZED PHYSICALIZES PICTORIALIZE PLAGIARIZERS PLAGIARIZING
PLASTICIZERS PLASTICIZING PLEBEIANIZED PLEBEIANIZES POLARIZATION
POLITICALIZE POLYGAMIZING POPULARIZING PORCELAINIZE PRAGMATIZING
PRODIGALIZED PRODIGALIZES PRUSSIANIZED PRUSSIANIZES PSALMODIZING
PURITANIZING QUANTIZATION QUIZZICALITY RACEMIZATION RADICALIZING
RATIONALIZED RATIONALIZER RATIONALIZES REALIZATIONS RECANALIZING
RECAPITALIZE REGIONALIZED REGIONALIZES REGULARIZING REHUMANIZING
RELATIVIZING REMILITARIZE REMINERALIZE REMORALIZING REORGANIZING
REPOLARIZING REPRIVATIZED REPRIVATIZES RESOCIALIZED RESOCIALIZES
RESTABILIZED RESTABILIZES REVALORIZING REVISUALIZED REVISUALIZES
REVITALIZING RHAPSODIZING RHIZOCTONIAS ROBOTIZATION ROMANIZATION
ROMANTICIZED ROMANTICIZES RURALIZATION SACCHARIZING SALINIZATION
SANITIZATION SATELLITIZED SATELLITIZES SATIRIZATION SCANDALIZING
SCHEMATIZING SCHISMATIZED SCHISMATIZES SCHIZOCARPIC SCHIZOTHYMIA
SECTARIANIZE SECTIONALIZE SECULARIZING SENSUALIZING SHERARDIZING
SINGULARIZED SINGULARIZES SLOGANIZINGS SOCIALIZABLE SOCIALIZINGS
SOLARIZATION SOLMIZATIONS SOLONIZATION SOMATIZATION SPANIOLIZING
SPATIALIZING SPECIALIZERS SPECIALIZING SPIRITUALIZE SPLENIZATION
STABILIZATOR STERILIZABLE STIGMATIZERS STIGMATIZING STRATEGIZING
STYLIZATIONS SUBERIZATION SUBSIDIZABLE SULFADIAZINE SUZERAINTIES
SYMPATHIZING TABULARIZING TANTALIZINGS TAXIDERMIZED TAXIDERMIZES
TECHNICALIZE TETANIZATION TEXTUALIZING THEATRICIZED THEATRICIZES
THEORIZATION THERMALIZING THIORIDAZINE TOTALIZATION TRAILBLAZING
TRANQUILIZED TRANQUILIZER TRANQUILIZES TRANQUILLIZE TRAUMATIZING
TRIVIALIZING TROPICALIZED TROPICALIZES UNAPPETIZING UNCANONIZING
UNHUMANIZING UNIONIZATION UNITIZATIONS UNIVERSALIZE UNMORALIZING
UNSOCIALIZED URBANIZATION UTILIZATIONS UTOPIANIZERS UTOPIANIZING
VALORIZATION VAPORIZATION VELARIZATION VILLAINIZING VIRILIZATION
VIRTUALIZING VITALIZATION VITAMINIZING VOCALIZATION VOLATILIZING
VOWELIZATION WARRANTIZING WEATHERIZING ZALCITABINES ZIGZAGGERIES
ZILLIONAIRES ZINCOGRAPHIC ZINJANTHROPI