| deranged(adjective, wild, silly, foolish, stupid) |
| dim(dull, unintelligent, witless) |
| fallacious(adjective, absurd) |
| feebleminded(weak, simple, silly, foolish, stupid) |
| flipped out(expression, silly, foolish, crazy, mad) |
| freaked out(expression, silly, foolish, crazy, mad) |
| futile(adjective, dull, simple, slow, silly) |
| halfwitted |
| ill-advised(dull, weak, simple, silly, foolish) |
| ill-judged(impractical, half-baked, doomed, imbecility folly) |
| impractical(adjective, wrong, wild, silly, foolish) |
| imprudent(adjective, weak, simple, wild, strange) |
| invalid(adjective, absurd) |
| jackass(adjective, foolish) |
| jejune |
| kooky(weak, simple, silly, foolish, crazy) |
| mad as a March hare(expression, idiom, silly, foolish, mad) |
| mad as a hatter(expression, idiom, silly, foolish, mad) |
| maniacal(adjective, mind, think, silly, crazy) |
| maudlin |