| insane(adjective, wild, silly, foolish, stupid) |
| crazy(adjective, wild, strange, silly, foolish) |
| daft(adjective, wild, silly, foolish, stupid) |
| nuts(adjective, slang, wild, silly, foolish) |
| nutty(adjective, slang, wild, silly, foolish) |
| batty(adjective, slang, wild, silly, foolish) |
| loony(adjective, informal, wild, silly, foolish) |
| touched(adjective, wild, silly, foolish, stupid) |
| mad(adjective, wild, silly, foolish, stupid) |
| demented(adjective, wild, silly, foolish, stupid) |
| loco(adjective, slang, insane, sane) |
| lunatic(adjective, wild, silly, foolish, stupid) |
| unbalanced(adjective, silly, foolish, crazy, mad) |
| barmy(adjective, silly, foolish, crazy, mad) |
| bonkers(adjective, informal, silly, foolish, crazy) |
| dotty(adjective, wrong, stupid, crazy, confused) |
| wacky(adjective, slang, wild, silly, foolish) |
| balmy(adjective, wild, silly, foolish, stupid) |
| crazed(adjective, wild, silly, foolish, stupid) |
| deranged(adjective, wild, silly, foolish, stupid) |