| crazy(adjective, weak, simple, foolish, stupid) |
| dopey(adjective, dull, slow, foolish, stupid) |
| half-witted(adjective, dull, weak, simple, slow) |
| inane(adjective, dull, simple, slow, silly) |
| daft(adjective, weak, simple, slow, silly) |
| dim(adjective, dull, simple, slow, stupid) |
| imbecile(adjective, dull, simple, silly, foolish) |
| irrational(adjective, weak, simple, foolish, stupid) |
| mad(adjective, weak, simple, silly, foolish) |
| headless |
| insane(adjective, weak, simple, silly, foolish) |
| nonsensical(adjective, dull, weak, simple, foolish) |
| unreasonable(adjective, weak, simple, foolish, stupid) |
| unthinking(adjective, dull, silly, foolish, stupid) |
| absurd(adjective, weak, simple, foolish, stupid) |
| giddy(adjective, simple, careless, silly, foolish) |
| ignorant(adjective, dull, simple, slow, silly) |
| illogical(adjective, foolish, stupid, unreasonable, thoughtless) |
| insensate(adjective, dull, simple, ability, slow) |
| loony(adjective, weak, simple, silly, foolish) |