| dumb(adjective, dull, simple, slow, silly) |
| goofy(adjective, silly, foolish, stupid, fantastic) |
| laughable(adjective, dull, strange, silly, stupid) |
| half-assed |
| nutty(adjective, weak, simple, wild, silly) |
| brainless(adjective, dull, weak, simple, slow) |
| unintelligent(adjective, dull, weak, simple, mind) |
| illogical(adjective, silly, foolish, stupid, insignificant) |
| loony(adjective, weak, simple, knowledge, ability) |
| lunatic(adjective, weak, simple, knowledge, ability) |
| cockeyed(adjective, knowledge, ability, informal, silly) |
| mindless(adjective, dull, simple, slow, silly) |
| unreasonable(adjective, weak, simple, silly, foolish) |
| witless(adjective, dull, weak, simple, slow) |
| batty(adjective, wild, silly, foolish, stupid) |
| dippy(adjective, simple, knowledge, slang, ability) |
| screwy(adjective, silly, stupid, crazy, mad) |
| wacky(adjective, weak, simple, knowledge, slang) |
| dull(adjective, simple, slow, silly, foolish) |
| thoughtless(adjective, silly, foolish, stupid, senseless) |