a person who is addicted to something harmful

person who has compulsion toward

a person who causes unrest in order to get political or social change

person who disturbs, causes trouble

a person with a strong opinion or belief and who thinks other ideas are wrong

intolerant, prejudiced person

a follower of any leader of religious thought, art, learning etc (especially one of the twelve personal followers of Jesus Christ)

believer, follower

a person with a strong interest (in sports, games etc)

person active in interest

(of) a person with excessive enthusiasm

person overenthusiastic about an interest

supporter; admirer

person who believes or has great interest

a mad person; a person with extreme enthusiasm

person who is crazy, overenthusiastic

person who dreams, is idealistic

person who dreams, is idealistic