| lunatic(adjective, weak, simple, silly, foolish) |
| senseless(adjective, weak, simple, foolish, stupid) |
| silly(adjective, simple, foolish, stupid, crazy) |
| witless(adjective, weak, simple, slow, silly) |
| absurd(adjective, weak, simple, silly, foolish) |
| asinine(adjective, weak, simple, silly, foolish) |
| gaga(noun, adjective, informal, sane) |
| idiotic(adjective, simple, silly, foolish, stupid) |
| screwy(adjective, slang, sane) |
| stupid(adjective, weak, simple, slow, silly) |
| unbalanced(adjective, sane) |
| brainless(adjective, weak, simple, slow, silly) |
| buggy(adjective, slang, silly, foolish, crazy) |
| cockeyed(adjective, slang, crazy, mad) |
| crackers(adjective, silly, crazy, sane) |
| maniac(noun, adjective, sane) |
| nonsensical(adjective, weak, simple, foolish, stupid) |
| ridiculous(adjective, weak, simple, silly, foolish) |
| touched(adjective, simple, silly, foolish, stupid) |
| barmy |