| crazy(adjective, informal, wild, strange, foolish) |
| nuts(adjective, slang, crazy, sane) |
| batty(adjective, slang, silly, crazy) |
| loony(adjective, informal, silly, foolish, crazy) |
| nutty(adjective, slang, crazy, sane) |
| insane(adjective, silly, foolish, crazy) |
| daft(adjective, silly, stupid, crazy) |
| barmy(adjective, silly, foolish, crazy) |
| balmy(adjective, silly, foolish, crazy) |
| loco(adjective, slang, crazy, sane) |
| unbalanced(adjective, silly, foolish, crazy) |
| lunatic(adjective, informal, silly, foolish, crazy) |
| screwy(adjective, slang, silly, foolish, crazy) |
| bananas(adjective, slang, crazy, sane) |
| cuckoo(adjective, slang, silly, foolish, crazy) |
| demented(adjective, silly, foolish, crazy) |
| deranged(adjective, simple, silly, foolish, crazy) |
| wacky(adjective, slang, silly, foolish, crazy) |
| cracked(adjective, informal, silly, foolish, crazy) |
| daffy(adjective, slang, informal, crazy) |