| crazy(adjective, strange, odd, insane) |
| balmy(adjective, crazy, odd, insane) |
| loony(adjective, crazy, odd, insane) |
| daft(adjective, crazy, odd, insane) |
| batty(adjective, silly, foolish, crazy) |
| nuts(adjective, silly, foolish, crazy) |
| nutty(adjective, silly, foolish, crazy) |
| bonkers(adjective, silly, foolish, crazy) |
| screwy(adjective, silly, foolish, crazy) |
| kooky(adjective, silly, foolish, crazy) |
| loopy(adjective, crazy, odd, insane) |
| wacky(adjective, crazy, odd, insane) |
| cracked(adjective, silly, foolish, crazy) |
| cuckoo(adjective, silly, foolish, crazy) |
| insane(adjective, silly, foolish, crazy) |
| lunatic(adjective, crazy, odd, insane) |
| deranged(adjective, silly, foolish, crazy) |
| mental(adjective, silly, foolish, crazy) |
| crazed(adjective, crazy, odd, insane) |
| round the bend(expression, adjective, idiom, silly, foolish) |