| loony(adjective, knowledge, ability, informal, foolish) |
| barmy(adjective, crazy, mad, insane) |
| mad(adjective, knowledge, ability, foolish, crazy) |
| balmy(adjective, knowledge, slang, ability, crazy) |
| crazy(adjective, knowledge, ability, informal, foolish) |
| daft(adjective, foolish, crazy, mad) |
| wacky(adjective, knowledge, slang, ability, informal) |
| lunatic(adjective, knowledge, ability, foolish, crazy) |
| absurd(adjective, knowledge, ability, foolish, crazy) |
| crazed(adjective, crazy, mad, insane) |
| nonsensical(adjective, knowledge, ability, foolish, crazy) |
| senseless(adjective, foolish, crazy, mad) |
| twisted(adjective, crazy, mad, insane) |
| delirious(adjective, crazy, mad, insane) |
| off-the-wall(adjective, crazy, mad, insane) |
| witless(adjective, foolish, crazy, mad) |
| agonized(adjective, crazy, mad, insane) |
| crackpot(adjective, crazy, mad, insane) |
| distracted(adjective, crazy, mad, insane) |
| distraught(adjective, crazy, mad, insane) |