There are 515 twelve-letter words containing A, I, N and Z, https://www.bestwordlist.com/c/a/4/12letterwordswithainz.htm
ABSOLUTIZING ADULTERIZING ADVERTIZINGS AEROBICIZING AEROSOLIZING
AGGRANDIZERS AGGRANDIZING ALBUMENIZING ALBUMINIZING ALCOHOLIZING
ALDOLIZATION ALKALINIZING ALLEGORIZING AMINOBENZOIC AMORTIZATION
AMORTIZEMENT ANABAPTIZING ANAESTHETIZE ANALYZATIONS ANATHEMATIZE
ANESTHETIZED ANESTHETIZES ANODIZATIONS ANTAGONIZING ANTHEROZOIDS
ANTHEROZOOID ANTHOLOGIZED ANTHOLOGIZER ANTHOLOGIZES ANTIOZONANTS
ANTISYZYGIES APOSTATIZING APOSTOLIZING APPETIZINGLY ARABIZATIONS
ARBORIZATION ASEPTICIZING ASSOILZIEING ASTRONOMIZED ASTRONOMIZES
ATOMIZATIONS ATTITUDINIZE AUDIBILIZING AUTOMATIZING AUTOTOMIZING
AXIOMATIZING AZATHIOPRINE BANALIZATION BASTARDIZING BEDAZZLINGLY
BESTIALIZING BIPOLARIZING BURGLARIZING CALENDARIZED CALENDARIZES
CANALIZATION CANISTERIZED CANISTERIZES CANNIBALIZED CANNIBALIZES
CANONIZATION CAPITALIZING CARAMELIZING CATABOLIZING CATALOGIZING
CATECHIZINGS CATEGORIZING CENTRALIZERS CENTRALIZING CHANNELIZING
CHAPTALIZING CHORIZATIONS CINEMATIZING CINNARIZINES CIVILIANIZED
CIVILIANIZES CIVILIZATION CLASSICIZING COLONIALIZED COLONIALIZES
COLONIZATION COLORIZATION COMMUNALIZED COMMUNALIZER COMMUNALIZES
CONSERVATIZE CONTAINERIZE CORDIALIZING CREOLIZATION CRIMINALIZED
CRIMINALIZES CRYSTALIZING CURARIZATION CUTINIZATION CYCLAZOCINES
CYCLIZATIONS DECARBONIZED DECARBONIZER DECARBONIZES DECENTRALIZE
DECIMALIZING DEHUMANIZING DEIONIZATION DELOCALIZING DEMAGNETIZED
DEMAGNETIZER DEMAGNETIZES DEMINERALIZE DEMONETARIZE DEMONIZATION
DEMORALIZING DENATURALIZE DENATURIZING DENUCLEARIZE DEPOLARIZING
DEPUTIZATION DERIVATIZING DESALINIZING DEVALORIZING DEVITALIZING
DEVOCALIZING DIAGONALIZED DIAGONALIZES DIALYZATIONS DIAZOMETHANE
DIBENZOFURAN DIGITALIZING DIGITIZATION DIMERIZATION DISHARMONIZE
DISORGANIZED DISORGANIZER DISORGANIZES DIVINIZATION DOCKIZATIONS
EARLIERIZING ELASTICIZING EMBLAZONRIES EMBOLIZATION EMOTIONALIZE
ENCARNALIZED ENCARNALIZES ENERGIZATION ENIGMATIZING ENZOOTICALLY
EQUALIZATION EROTIZATIONS ESSENTIALIZE ESTERIZATION ETERNALIZING
ETERNIZATION ETHERIZATION EUTHANATIZED EUTHANATIZES EVANGELIZERS
EVANGELIZING EVENTUALIZED EVENTUALIZES EXTERNALIZED EXTERNALIZES
FACTIONALIZE FANATICIZING FARADIZATION FEDERALIZING FEMINIZATION
FIBERIZATION FICTIONALIZE FINALIZATION FLUIDIZATION FLUPHENAZINE
FOCALIZATION FRACTIONIZED FRACTIONIZES FRAGMENTIZED FRAGMENTIZES
FRANCIZATION FRATERNIZERS FRATERNIZING FURAZOLIDONE FUSTIANIZING
GABERLUNZIES GAZETTEERING GELATINIZERS GELATINIZING GENEALOGIZED
GENEALOGIZES GENERALIZERS GENERALIZING GLAMOURIZING GOLIATHIZING
GORMANDIZERS GORMANDIZING GOURMANDIZED GOURMANDIZES GRANGERIZERS
GRANGERIZING GRAPHITIZING GRECIANIZING HANSARDIZING HARMONIZABLE
HAUSSMANNIZE HEATHENIZING HEBRAIZATION HEPARINIZING HEPATIZATION
HISPANICIZED HISPANICIZES HISPANIOLIZE HOMINIZATION HORIZONTALLY
HUMANIZATION HYDRALAZINES HYPNOTIZABLE IDEALIZATION IDOLATRIZING
IDOLIZATIONS ILLEGALIZING IMMUNIZATION INCOGNIZABLE INCOGNIZANCE
INFAMONIZING INFANTILIZED INFANTILIZES INFORMATIZED INFORMATIZES
INITIALIZING INTERNALIZED INTERNALIZES IRIDIZATIONS ISOENZYMATIC
ITALIANIZING ITEMIZATIONS JEOPARDIZING JOURNALIZERS JOURNALIZING
KERATINIZING KYANIZATIONS LAICIZATIONS LAMINARIZING LATERALIZING
LATERIZATION LATINIZATION LEGALIZATION LETHARGIZING LEXICALIZING
LIBERALIZING LIONIZATIONS LITERALIZING LOCALIZATION MACADAMIZING
MADERIZATION MAGNETIZABLE MARGINALIZED MARGINALIZES MARZIPANNING
MASCULINIZED MASCULINIZES MAXIMIZATION MECHANIZABLE MEDICALIZING
MELANIZATION MEMORIZATION MERCHANDIZED MERCHANDIZER MERCHANDIZES
METABOLIZING METALIZATION MILITARIZING MINERALIZERS MINERALIZING
MINERALOGIZE MINIATURIZED MINIATURIZES MINIMIZATION MISSIONARIZE
MOBILIZATION MONARCHIZING MONETIZATION MORALIZATION MOTORIZATION
MUNICIPALIZE MUSICALIZING MUTAGENIZING NAPHTHALIZED NAPHTHALIZES
NASALIZATION NATIONALIZED NATIONALIZER NATIONALIZES NATURALIZING
NAZIFICATION NEBULIZATION NEOPAGANIZED NEOPAGANIZES NEUTRALIZERS
NEUTRALIZING NEWSMAGAZINE NOMADIZATION NOMINALIZING NONENZYMATIC
NORMALIZABLE NOTARIZATION NOVELIZATION NUCLEARIZING OPSONIZATION
OPTIMALIZING OPTIMIZATION ORGANIZATION ORIENTALIZED ORIENTALIZES
OUTBRAZENING OUTORGANIZED OUTORGANIZES OVERGRAZINGS OVERORGANIZE
OXIDIZATIONS OZONISATIONS OZONIZATIONS PAGANIZATION PALATALIZING
PANCREOZYMIN PANEGYRIZING PARABOLIZING PARALOGIZING PARALYZATION
PARALYZINGLY PARASITIZING PARCHMENTIZE PARENTHESIZE PARTIALIZING
PARTIZANSHIP PASTEURIZING PATRIALIZING PECTIZATIONS PEDANTICIZED
PEDANTICIZES PENALIZATION PENTAZOCINES PEPTIZATIONS PERPHENAZINE
PERSONALIZED PERSONALIZES PHENARSAZINE PLAGIARIZING PLASMOLYZING
PLASTICIZING PLEBEIANIZED PLEBEIANIZES POLARIZATION POLYGAMIZING
POPULARIZING PORCELAINIZE PORCELLANIZE PRAGMATIZING PRECOGNIZANT
PRIVATDOZENT PROCARBAZINE PROMETHAZINE PROPAGANDIZE PRUSSIANIZED
PRUSSIANIZES PSALMODIZING PURITANIZING QUANTIZATION RACEMIZATION
RADICALIZING RATIONALIZED RATIONALIZER RATIONALIZES REALIZATIONS
RECANALIZING RECENTRALIZE RECOGNIZABLE RECOGNIZABLY RECOGNIZANCE
REGIONALIZED REGIONALIZES REGULARIZING REHARMONIZED REHARMONIZES
REHUMANIZING RELATIVIZING REMINERALIZE REMORALIZING RENORMALIZED
RENORMALIZES REORGANIZERS REORGANIZING REPOLARIZING REVALORIZING
REVITALIZING RHAPSODIZING RHIZOCTONIAS ROBOTIZATION ROMANIZATION
ROMANTICIZED ROMANTICIZES RURALIZATION SACCHARIZING SALINIZATION
SANCTUARIZED SANCTUARIZES SANITIZATION SATIRIZATION SCANDALIZERS
SCANDALIZING SCHEMATIZING SECTARIANIZE SECTIONALIZE SECULARIZING
SENSUALIZING SHERARDIZING SINGULARIZED SINGULARIZES SIZEABLENESS
SLEAZINESSES SLOGANIZINGS SNAZZINESSES SOCIALIZINGS SOLARIZATION
SOLMIZATIONS SOLONIZATION SOMATIZATION SPANIOLIZING SPATIALIZING
SPECIALIZING SPLENIZATION STANDARDIZED STANDARDIZER STANDARDIZES
STIGMATIZING STRATEGIZING STYLIZATIONS SUBERIZATION SUBURBANIZED
SUBURBANIZES SULFADIAZINE SUZERAINTIES SYCOPHANTIZE SYMPATHIZING
TABULARIZING TANTALIZINGS TECHNICALIZE TETANIZATION TEXTUALIZING
THEORIZATION THERMALIZING THIORIDAZINE TOTALIZATION TRAILBLAZING
TRANQUILIZED TRANQUILIZER TRANQUILIZES TRANQUILLIZE TRAUMATIZING
TRIVIALIZING UNADVERTIZED UNAPPETIZING UNAUTHORIZED UNCANONIZING
UNCAPSIZABLE UNDRAMATIZED UNEMPHASIZED UNFEUDALIZED UNFEUDALIZES
UNFORMALIZED UNGLAMORIZED UNHUMANIZING UNIONIZATION UNITIZATIONS
UNIVERSALIZE UNMECHANIZED UNMECHANIZES UNMORALIZING UNNATURALIZE
UNPATRONIZED UNREALIZABLE UNSENSUALIZE UNSOCIALIZED UNVERBALIZED
UNVULGARIZED UNVULGARIZES URBANIZATION UTILIZATIONS UTOPIANIZERS
UTOPIANIZING VAGABONDIZED VAGABONDIZES VALORIZATION VAPORIZATION
VELARIZATION VILLAINIZING VIRILIZATION VIRTUALIZING VITALIZATION
VITAMINIZING VOCALIZATION VOLATILIZING VOWELIZATION VULCANIZABLE
VULCANIZATES WARRANTIZING WEATHERIZING ZALCITABINES ZANTEDESCHIA
ZILLIONAIRES ZINCOGRAPHER ZINCOGRAPHIC ZINJANTHROPI ZOANTHARIANS
ZOANTHROPIES ZOOGRAFTINGS ZOOMAGNETISM ZOOSPORANGIA ZOOTECHNICAL