| unhinged(adjective, silly, foolish, crazy, mad) |
| barmy(adjective, crazy, mad, odd, insane) |
| madcap(noun, adjective, person, silly, crazy) |
| screwball(noun, adjective, slang, wild, silly) |
| bedlamite(noun, adjective, person, silly, foolish) |
| dippy(adjective, weak, knowledge, slang, ability) |
| dotty(adjective, weak, simple, silly, foolish) |
| foolish(adjective, weak, simple, knowledge, ability) |
| unsound(adjective, foolish, crazy, mad, unstable) |
| kooky(adjective, weak, simple, wild, silly) |
| mentally ill(expression, adjective, idiom, mad, insane) |
| not all there(expression, adjective, idiom, unstable, disturbed) |
| potty(adjective, wild, silly, foolish, crazy) |
| wild(adjective, silly, foolish, stupid, crazy) |
| bananas(adjective, slang, crazy, mad, sane) |
| daffy(adjective, weak, simple, informal, silly) |
| daredevil |
| freak(noun, person, crazy, nut, fanatic) |
| fruity(adjective, slang, silly, foolish, mad) |
| imbecile(silly, foolish, crazy, insane, unintelligent) |