| nitwitted(adjective, simple, silly, foolish, stupid) |
| nonsensical(adjective, foolish, crazy, mad, odd) |
| unwise(adjective, weak, simple, careless, silly) |
| wacky(adjective, informal, foolish, crazy, mad) |
| empty-headed(adjective, careless, indifferent, silly, foolish) |
| imbecilic(adjective, dull, weak, simple, slow) |
| irrational(adjective, weak, simple, careless, silly) |
| nutty(adjective, weak, simple, silly, foolish) |
| thoughtless(adjective, careless, indifferent, silly, foolish) |
| absurd(adjective, foolish, crazy, mad, odd) |
| daffy(adjective, weak, simple, slow, silly) |
| imbecile(adjective, dull, simple, silly, foolish) |
| inane(adjective, dull, simple, slow, careless) |
| insane(adjective, weak, simple, silly, foolish) |
| insensate(adjective, dull, simple, ability, slow) |
| lunatic(adjective, foolish, crazy, mad, odd) |
| obtuse(adjective, dull, simple, slow, careless) |
| thick(adjective, dull, simple, slow, silly) |
| weak-minded(adjective, ability, planned) |
| dippy(adjective, weak, simple, silly, foolish) |