There are 540 twelve-letter words containing A, N and Z, https://www.bestwordlist.com/c/a/3/12letterwordswithanz.htm
ABSOLUTIZING ADULTERIZING ADVERTIZINGS AEROBICIZING AEROSOLIZING
AGGRANDIZERS AGGRANDIZING ALBUMENIZING ALBUMINIZING ALCOHOLIZING
ALDOLIZATION ALKALINIZING ALLEGORIZING AMAZEDNESSES AMAZONSTONES
AMINOBENZOIC AMORTIZATION AMORTIZEMENT ANABAPTIZING ANAESTHETIZE
ANALYZATIONS ANASTROZOLES 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 BEDAZZLEMENT BEDAZZLINGLY BENZALDEHYDE
BENZOAPYRENE BESTIALIZING BIPOLARIZING BRAZENNESSES 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 EMBLAZONMENT
EMBLAZONRIES EMBOLIZATION EMOTIONALIZE ENCARNALIZED ENCARNALIZES
ENERGIZATION ENIGMATIZING ENZOOTICALLY EQUALIZATION EROTIZATIONS
ESSENTIALIZE ESTERIZATION ESTRAMAZONES ETERNALIZING ETERNIZATION
ETHERIZATION EUTHANATIZED EUTHANATIZES EVANGELIZERS EVANGELIZING
EVENTUALIZED EVENTUALIZES EXTERNALIZED EXTERNALIZES EXTRAVAGANZA
FACTIONALIZE FANATICIZING FARADIZATION FEDERALIZING FEMINIZATION
FIBERIZATION FICTIONALIZE FINALIZATION FLUCONAZOLES 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 KATZENJAMMER KERATINIZING KETOCONAZOLE KYANIZATIONS
LAICIZATIONS LAMINARIZING LATERALIZING LATERIZATION LATINIZATION
LEGALIZATION LETHARGIZING LEXICALIZING LIBERALIZING LIONIZATIONS
LITERALIZING LOCALIZATION MACADAMIZING MADERIZATION MAGNETIZABLE
MANGELWURZEL 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 NONHAZARDOUS
NORMALIZABLE NOTARIZATION NOVELIZATION NUCLEARIZING OPSONIZATION
OPTIMALIZING OPTIMIZATION ORGANIZATION ORIENTALIZED ORIENTALIZES
OUTBRAZENING OUTORGANIZED OUTORGANIZES OVERANALYZED OVERANALYZES
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 SPERMATOZOAN SPERMATOZOON
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 UNANALYZABLE 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 ZALAMBDODONT ZALCITABINES
ZANTEDESCHIA ZANTHOXYLUMS ZILLIONAIRES ZINCOGRAPHER ZINCOGRAPHIC
ZINJANTHROPI ZOANTHARIANS ZOANTHROPIES ZOOGRAFTINGS ZOOMAGNETISM
ZOOPLANKTERS ZOOPLANKTONS ZOOSPORANGIA ZOOTECHNICAL ZOOXANTHELLA