| freak(noun, activity, person, part, character) |
| fiend(noun, activity, concern, interest, informal) |
| screwball(noun, person, slang, crazy, sick) |
| maniac(noun, person, concern, informal, crazy) |
| addict(noun, person, radical, fan, fanatic) |
| cum(noun, verb, action, act, process) |
| crackpot(noun, character, crazy, mad, wise) |
| crazy(noun, adjective, wise, radical, fanatic) |
| fanatic(noun, person, character, concern, interest) |
| loony(noun, adjective, slang, informal, crazy) |
| kook(noun, person, character, slang, unusual) |
| lunatic(noun, adjective, person, informal, crazy) |
| buff(noun, adjective, concern, informal, authority) |
| devotee(noun, concern, authority, expert, supporter) |
| zealot(noun, person, concern, crazy, supporter) |
| eccentric(noun, person, character, informal, figure) |
| enthusiast(noun, concern, interest, informal, authority) |
| nutcase(noun, slang, sick, fanatic, patient) |
| aficionado(noun, activity, authority, expert, bug) |
| bug(noun, concern, supporter, radical, fan) |