| loopy(adjective, knowledge, ability, informal, foolish) |
| certifiable |
| distraught(adjective, crazy, mad, odd, confused) |
| gaga(adjective, informal, insane, sane, distraught) |
| idiot |
| inane(adjective, simple, silly, foolish, crazy) |
| ludicrous(adjective, weak, simple, silly, foolish) |
| madwoman(noun, crazy, loony, worrier, nutter) |
| nonsensical(adjective, knowledge, ability, crazy, mad) |
| oddball(noun, eccentric) |
| out to lunch(expression, adjective, idiom, silly, mad) |
| preposterous(adjective, weak, simple, knowledge, ability) |
| senseless(adjective, crazy, mad, odd, insane) |
| tomfool(adjective, knowledge, ability, foolish) |
| weirdo(noun, slang, wise, eccentric) |
| witless(adjective, foolish, crazy, mad, odd) |
| zany(adjective, weak, simple, knowledge, ability) |
| brainsick(adjective, wrong, wild, crazy, confused) |
| crackers |
| disordered(adjective, wrong, hot, crazy, confused) |