| irrational(adjective, silly, foolish, stupid, insane) |
| nuts(adjective, slang, silly, foolish, stupid) |
| nutty(adjective, slang, silly, foolish, stupid) |
| off(adjective, insane, sane) |
| psycho(silly, foolish, mad, insane, unwise) |
| senseless(adjective, silly, foolish, stupid, insane) |
| unhinged(adjective, silly, foolish, stupid, mad) |
| unsettled(adjective, silly, foolish, stupid, insane) |
| unsound(adjective, insane, sane) |
| batty(adjective, slang, silly, foolish, stupid) |
| bonkers(adjective, informal, silly, foolish, mad) |
| crackbrained |
| crackpot |
| frenzied(adjective, silly, foolish, stupid, insane) |
| maddened |
| maniac(noun, adjective, insane, sane) |
| maniacal(adjective, silly, foolish, stupid, mad) |
| non compos mentis(expression, adjective, idiom, law, sane) |
| psychotic(adjective, silly, foolish, stupid, insane) |
| bizarre(adjective, silly, foolish, stupid, insane) |