| crazy(noun, adjective, wild, strange, silly) |
| nut(noun, person, slang, crazy, sick) |
| eccentric(noun, adjective, person, character, wild) |
| loony(noun, adjective, slang, informal, wild) |
| crackpot(noun, adjective, person, character, crazy) |
| kook(noun, person, slang, sick, wise) |
| nutcase(noun, slang, sick, fanatic, loony) |
| lunatic(noun, adjective, wild, silly, foolish) |
| weirdo(noun, person, character, slang, crazy) |
| crank(noun, informal, crazy, wise, eccentric) |
| cuckoo(noun, adjective, slang, silly, crazy) |
| character(noun, person, eccentric, freak, oddball) |
| freak(noun, person, character, crazy, nut) |
| oddball(noun, adjective, person, character, crazy) |
| nutter(noun, slang, sick, mad person) |
| nutty(adjective, silly, foolish, crazy, mad) |
| zany(noun, adjective, person, silly, foolish) |
| Nut |
| geek(noun, freak, oddball) |
| kooky(adjective, slang, silly, foolish, crazy) |