| daft(adjective, weak, simple, wild, silly) |
| insane(adjective, weak, simple, knowledge, ability) |
| loony(adjective, knowledge, ability, informal, foolish) |
| wild(adjective, crazy, mad, odd, insane) |
| farcical(adjective, ridiculous, absurd) |
| risible |
| outlandish(adjective, silly, foolish, ridiculous, absurd) |
| pointless(adjective, dull, simple, value, silly) |
| wacky(adjective, weak, simple, wrong, knowledge) |
| dumb(adjective, dull, foolish, stupid, half-baked) |
| unreasonable(adjective, weak, simple, wrong, severe) |
| cockeyed(adjective, knowledge, ability, informal, silly) |
| dippy(adjective, weak, knowledge, slang, ability) |
| extravagant(adjective, severe, harsh, strange, stupid) |
| illogical(adjective, wrong, silly, foolish, stupid) |
| witless(adjective, foolish, crazy, mad, odd) |
| zany(adjective, weak, simple, knowledge, ability) |
| brainless(adjective, dull, weak, simple, foolish) |
| crackpot(adjective, foolish, crazy, mad, odd) |
| derisory(adjective, silly, foolish, fantastic, absurd) |