| crazy(adjective, weak, character, simple, wrong) |
| nutty(noun, adjective, weak, simple, wrong) |
| mad(adjective, weak, simple, wrong, unusual) |
| daft(adjective, weak, simple, wild, silly) |
| loony(adjective, weak, simple, wrong, wild) |
| batty(noun, adjective, wild, silly, foolish) |
| eccentric(adjective, character, unusual, wild, strange) |
| goofy(adjective, silly, foolish, unwise, frivolous) |
| nuts(noun, adjective, wild, silly, foolish) |
| barmy(adjective, silly, foolish, crazy, mad) |
| peculiar(adjective, unusual, strange, crazy, usual) |
| queer(adjective, unusual, strange, crazy, usual) |
| wacky(adjective, weak, simple, wrong, unusual) |
| weird(adjective, informal, unusual, strange, crazy) |
| balmy(adjective, silly, foolish, crazy, mad) |
| bonkers(adjective, silly, foolish, crazy, mad) |
| loopy(adjective, foolish) |
| odd(adjective, unusual, wild, strange, crazy) |
| bizarre(adjective, unusual, wild, strange, crazy) |
| dotty(noun, adjective, weak, simple, silly) |