| crazy(adjective, light, character, wrong, unusual) |
| screwy(adjective, silly, crazy, insane) |
| nutty(adjective, light, wrong, unusual, wild) |
| wacky(adjective, light, wrong, unusual, wild) |
| balmy(adjective, silly, foolish, crazy) |
| daft(adjective, informal, wild, silly, foolish) |
| erratic(adjective, informal, careless, silly) |
| kooky(adjective, strange, silly, crazy) |
| barmy(adjective, silly, foolish, crazy) |
| batty(adjective, light, wild, silly, foolish) |
| dippy(adjective, light, silly, stupid, crazy) |
| insane(adjective, simple, silly, foolish, crazy) |
| screwball(adjective, silly, foolish, crazy) |
| silly(adjective, light, wrong, wild, foolish) |
| absurd(adjective, light, wrong, happy, informal) |
| bonkers(adjective, simple, silly, foolish, crazy) |
| cuckoo(adjective, silly, foolish, crazy) |
| foolish(adjective, wrong, wild, silly, stupid) |
| idiotic(adjective, wild, silly, foolish, stupid) |
| nuts(adjective, simple, silly, foolish, crazy) |