| touched(adjective, silly, stupid, crazy) |
| unbalanced(adjective, silly, foolish, crazy) |
| crackpot(noun, adjective, wise, schizophrenic) |
| idiotic(adjective, wild, silly, foolish, stupid) |
| kook(noun, slang, sick, wise) |
| mental(noun, adjective, slang, silly) |
| silly(adjective, foolish, stupid, crazy) |
| crank(noun, informal, wise, schizophrenic) |
| kooky(adjective, silly, foolish, crazy) |
| loon(noun, slang, informal, sick) |
| of unsound mind(expression, adjective, idiom, silly) |
| ape(silly, foolish, crazy, insane) |
| maniacal(adjective, silly, stupid, crazy) |
| out to lunch(expression, adjective, idiom, silly) |
| psychotic(noun, adjective, silly, foolish, stupid) |
| round the bend(expression, idiom, silly, foolish) |
| unhinged(adjective, silly, foolish, stupid, crazy) |
| maniac(noun, adjective, crazy, confused) |
| moonstruck(adjective, silly, foolish, stupid) |
| schizo(noun, adjective, slang, silly) |