| barmy(adjective, silly, foolish, insane) |
| batty(adjective, silly, foolish, insane) |
| bonkers(adjective, silly, foolish, insane) |
| nuts(adjective, silly, foolish, insane) |
| fruity(adjective, silly, foolish, insane) |
| kooky(adjective, silly, foolish, insane) |
| nutty(adjective, silly, foolish, insane) |
| wacky(adjective, silly, foolish, insane) |
| cracked(adjective, silly, foolish, insane) |
| daft(adjective, silly, foolish, insane) |
| cuckoo(adjective, silly, foolish, insane) |
| insane(adjective, silly, foolish, unwise) |
| potty(adjective, wild, silly, foolish) |
| bats in the belfry(expression, adjective, idiom, wild, silly) |
| flaky(adjective, silly, foolish, insane) |
| flipped(adjective, silly, foolish, insane) |
| flipped out(expression, adjective, silly, foolish) |
| freaked out(expression, adjective, silly, foolish) |
| mad as a March hare(expression, adjective, idiom, wild, silly) |
| mad as a hatter(expression, adjective, idiom, wild, silly) |