| mad as a hatter(expression, adjective, idiom, wild, silly) |
| maniacal(silly, foolish, unwise) |
| mental(silly, foolish, unwise) |
| mentally strange(expression, silly, foolish, unwise) |
| moonstruck(silly, foolish, unwise) |
| moronic(impractical, half-baked, doomed) |
| nuts(silly, foolish, unwise) |
| nutty(silly, foolish, unwise) |
| nutty as fruitcake(expression, adjective, idiom, wild, silly) |
| of unsound mind(expression, adjective, idiom, wild, silly) |
| out to lunch(expression, adjective, idiom, wild, silly) |
| outlandish(silly, foolish, unwise) |
| poorly planned(expression, impractical, half-baked, doomed) |
| potty(adjective, wild, silly, foolish, senseless) |
| psycho(silly, foolish, unwise) |
| retarded(impractical, half-baked, doomed) |
| round the bend(expression, adjective, idiom, wild, silly) |
| schizo(adjective, wild, silly, foolish, senseless) |
| screw loose(expression, adjective, wild, silly, foolish) |
| screwball(silly, foolish, unwise) |