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22 words ending with n, 19 letters long

adrenocorticotropin antidesertification conventionalization countermobilization cytodifferentiation dehydrochlorination deindustrialization departmentalization homotransplantation immunoprecipitation intellectualization interstratification mischaracterization overdifferentiation photodisintegration photointerpretation professionalization reconceptualization reindustrialization superspecialization ultracentrifugation underrepresentation