| ape(silly, foolish, crazy, insane) |
| berserk(silly, foolish, crazy, insane) |
| cracked(adjective, simple, silly, foolish, crazy) |
| crazed(adjective, silly, foolish, crazy) |
| delirious(silly, foolish, crazy, unreasonable) |
| dingy(silly, foolish, insane, unwise) |
| maniacal(silly, foolish, crazy, insane) |
| mental(adjective, simple, silly, foolish, crazy) |
| moonstruck(silly, foolish, insane, unwise) |
| nonsensical(adjective, wrong, wild, silly, foolish) |
| psycho(unusual, silly, foolish, crazy) |
| psychotic(crazy, unstable, disturbed, erratic) |
| schizo(silly, foolish, insane, unwise) |
| touched(adjective, simple, silly, foolish) |
| unbalanced(adjective, simple, silly, foolish, crazy) |
| unglued(silly, foolish, unstable, insane) |
| unhinged(adjective, simple, strange, silly, foolish) |
| unsound(adjective, wrong, silly, foolish, stupid) |
| unzipped(silly, foolish, insane, unwise) |
| aper(silly, insane) |