| eccentric(noun, unusual, silly, foolish, crazy) |
| crazed(adjective, bad, silly, foolish, crazy) |
| schizoid(adjective, bad, mad, ill, insane) |
| irrational(adjective, bad, silly, foolish, mad) |
| psychopathic(adjective, bad, mad, ill, insane) |
| aberrant(adjective, bad, mad, usual, ill) |
| geek(noun, crazy, mad, odd) |
| mentally ill(expression, adjective, idiom, unwell) |
| screwball(noun, slang, silly, mad, sick) |
| unhinged(silly, foolish, mad, insane, cuckoo) |
| nutcase(noun, adjective, slang, mad, sick) |
| daft(adjective, bad, silly, foolish, crazy) |
| kooky(adjective, bad, silly, foolish, crazy) |
| maniacal(adjective, bad, silly, foolish, crazy) |
| cracked(strange, silly, foolish, crazy, mad) |
| crackers(adjective, strange, fool, mad, freak) |
| frenzied(adjective, bad, mad, ill, insane) |
| loco(adjective, strange, fool, mad, freak) |
| nutter(noun, bad, slang, mad, ill) |
| schizo(noun, slang, silly, foolish, mad) |