| witless(adjective, dull, weak, simple, silly) |
| brainless(adjective, weak, simple, silly, foolish) |
| nutty(adjective, weak, simple, silly, foolish) |
| insane(adjective, weak, simple, silly, foolish) |
| loony(adjective, weak, simple, careless, silly) |
| vacuous |
| doltish(adjective, weak, simple, silly, foolish) |
| laughable |
| meaningless(adjective, simple, silly, foolish, stupid) |
| pointless(adjective, simple, silly, foolish, stupid) |
| simple(adjective, weak, silly, foolish, stupid) |
| unreasonable(adjective, weak, simple, silly, foolish) |
| wacky(adjective, weak, simple, silly, foolish) |
| dippy(adjective, weak, simple, silly, foolish) |
| dotty(adjective, weak, simple, silly, foolish) |
| goofy(adjective, foolish) |
| imbecile(adjective, dull, simple, silly, foolish) |
| thick(adjective, silly, foolish, stupid, unreasonable) |
| batty(adjective, silly, foolish, stupid, crazy) |
| daffy(adjective, weak, simple, silly, foolish) |