| nut(noun, person, concern, slang, informal) |
| zealot(noun, person, concern, crazy, nut) |
| freak(noun, person, concern, slang, crazy) |
| fanatic(noun, person, concern, interest, crazy) |
| enthusiast(noun, person, concern, interest, nut) |
| buff(noun, concern, informal, nut) |
| bug(noun, concern, nut, radical) |
| devotee(noun, concern, nut, radical) |
| addict(noun, nut, radical, fanatic) |
| monomaniac(noun, radical, fanatic, intolerant) |
| aficionado(noun, nut, fanatic, freak) |
| eccentric(noun, adjective, stupid, crazy, irrational) |
| follower(noun, fanatic, buff, enthusiast) |
| partisan(noun, radical, fanatic, intolerant) |
| participant(noun, fanatic, buff) |
| admirer(noun, fanatic, buff, enthusiast) |
| believer(noun, fanatic, buff) |
| bum(noun, fanatic, buff, participant) |
| habitué(fanatic, buff) |
| lover(noun, nut, fanatic, buff) |