| crazed(adjective, wild, silly, foolish, stupid) |
| daffy(adjective, informal, silly, foolish, stupid) |
| idiotic(adjective, wild, silly, foolish, stupid) |
| buggy(adjective, slang, silly, foolish, crazy) |
| fruity(adjective, slang, silly, foolish) |
| mental(adjective, silly, foolish, stupid, crazy) |
| potty(adjective, wild, silly, foolish, crazy) |
| round the bend(expression, adjective, idiom, silly, foolish) |
| unhinged(adjective, silly, stupid, crazy) |
| dippy(adjective, light, silly, stupid) |
| irrational(adjective, wild, silly, foolish, stupid) |
| of unsound mind(expression, adjective, idiom, silly) |
| eccentric(adjective, keen, warm, wild, silly) |
| maniacal(adjective, silly, stupid, crazy) |
| out to lunch(expression, adjective, idiom, silly) |
| absurd(adjective, light, wild, silly, foolish) |
| berserk(adjective, silly, foolish, crazy) |
| delirious(adjective, silly, foolish, crazy) |
| flaky(adjective, light, wild, silly, foolish) |
| moonstruck(adjective, silly, foolish, stupid) |