| cracked(adjective, silly, foolish, mad, insane) |
| crazed(adjective, silly, foolish, mad, insane) |
| crazy(adjective, wild, strange, silly, foolish) |
| crazy as a loon(expression, adjective, sick, hacked, lunatic) |
| cuckoo(adjective, silly, foolish, mad, insane) |
| daft(adjective, silly, foolish, mad, insane) |
| delirious(adjective, silly, foolish, mad, insane) |
| demented(adjective, silly, foolish, mad, insane) |
| deranged(adjective, silly, foolish, mad, insane) |
| dingy(adjective, silly, foolish, mad, insane) |
| dippy(adjective, silly, foolish, mad, insane) |
| erratic(adjective, silly, foolish, mad, insane) |
| flaky(adjective, silly, foolish, mad, insane) |
| flipped(adjective, silly, foolish, mad, insane) |
| fruity(adjective, silly, foolish, mad, insane) |
| idiotic(adjective, silly, foolish, mad, insane) |
| in the ozone(expression, adjective, idiom, crazy, hysterical) |
| insane(adjective, silly, foolish, mad, unwise) |
| kooky(adjective, silly, foolish, mad, insane) |
| lunatic(adjective, silly, foolish, mad, insane) |