| mad(adjective, crazy, unstable, insane) |
| demented(adjective, unstable, disturbed, unsound) |
| insane(adjective, mad, unstable, disturbed) |
| of unsound mind(expression, adjective, idiom, foolish) |
| crazy(noun, adjective, foolish, stupid) |
| daft(adjective, unstable, disturbed, sane) |
| lunatic(noun, adjective, foolish, crazy) |
| unbalanced(adjective, mad, unstable, insane) |
| loco(adjective, slang, mad, insane) |
| touched(adjective, unstable, disturbed, sane) |
| batty(adjective, slang, unstable, disturbed) |
| nuts(adjective, slang, mad, insane) |
| bonkers(adjective, informal, sane) |
| cracked(adjective, informal, sane) |
| loony(noun, adjective, informal, foolish) |
| dotty(adjective, sane) |
| maniacal(adjective, sane) |
| not all there(expression, adjective, idiom, unstable) |
| nutty(adjective, slang, unstable, disturbed) |
| bananas(adjective, slang, foolish, crazy) |