| insane(adjective, foolish, stupid, crazy, mad) |
| lunatic(noun, adjective, person, crazy, mad) |
| mad(noun, adjective, silly, foolish, stupid) |
| crazy(noun, adjective, person, foolish, stupid) |
| deranged(noun, adjective, crazy, mad, unstable) |
| psycho(noun, adjective, person, crazy, mad) |
| demented(noun, adjective, crazy, mad, unstable) |
| loony(noun, adjective, person, silly, foolish) |
| maniac(noun, adjective, person, crazy, mad) |
| unbalanced(adjective, mad, unstable, insane, disturbed) |
| mental(adjective, silly, foolish, stupid, insane) |
| crackpot(noun, adjective, person, mad, madness) |
| madman(noun, person, informal, madness, insanity) |
| nuts(noun, adjective, silly, foolish, stupid) |
| psychopath(noun, person, mad, madness, insanity) |
| batty(adjective, silly, foolish, stupid, unstable) |
| kook(noun, person, mad, madness, insanity) |
| maniacal(adjective, silly, foolish, stupid, crazy) |
| neurotic(noun, adjective, mad, troubled, insane) |
| nutty(adjective, silly, foolish, stupid, crazy) |