• xitizen the world,
• vitizen the world,
• fitizen the world,
• ditizen the world,
• cutizen the world,
• cjtizen the world,
• cktizen the world,
• cotizen the world,
• c9tizen the world,
• c8tizen the world,
• cirizen the world,
• cifizen the world,
• cigizen the world,
• ciyizen the world,
• ci6izen the world,
• ci5izen the world,
• cituzen the world,
• citjzen the world,
• citkzen the world,
• citozen the world

The adjective form of "citizen of the world" is "cosmopolitan".