| mad(adjective, silly, foolish, insane, unwise) |
| maniacal(adjective, silly, foolish, mad, insane) |
| manic(adjective, crazy, hysterical, lunatic, potty) |
| mental(adjective, silly, foolish, mad, insane) |
| moonstruck(adjective, silly, foolish, mad, insane) |
| non compos mentis(expression, adjective, idiom, crazy, hysterical) |
| not all there(expression, adjective, sick, hacked, lunatic) |
| nuts(adjective, silly, foolish, mad, insane) |
| nutty(adjective, silly, foolish, mad, insane) |
| nutty as a fruitcake(expression, adjective, idiom, crazy, hysterical) |
| psycho(adjective, silly, foolish, mad, insane) |
| schizoid(adjective, crazy, hysterical, lunatic, potty) |
| screwball(adjective, silly, foolish, mad, insane) |
| screwy(adjective, silly, foolish, mad, insane) |
| sick in the head(expression, adjective, sick, hacked, lunatic) |
| silly(adjective, foolish, mad, insane, unwise) |
| stark raving mad(expression, adjective, sick, hacked, lunatic) |
| touched(adjective, silly, foolish, mad, insane) |
| unbalanced(adjective, silly, foolish, mad, insane) |
| unhinged(adjective, silly, foolish, mad, insane) |