| coo-coo(noun, bad, slang, mad, ill) |
| crack-brain(noun, bad, slang, mad, ill) |
| crack-brained(adjective, bad, mad, ill, insane) |
| crack-skull(noun, bad, slang, mad, ill) |
| cranky(adjective, strange, fool, mad, freak) |
| foolish(adjective, strange, silly, unwise, madness) |
| fruit-cake(noun, bad, slang, mad, ill) |
| fruitcake(noun, crazy, mad, odd, lunatic) |
| gaga(adjective, strange, fool, mad, freak) |
| goo-goo(noun, bad, slang, mad, ill) |
| goof(noun, bad, slang, mad, ill) |
| manic(adjective, strange, fool, mad, freak) |
| mishoogeh(noun, bad, slang, mad, ill) |
| mishugah(noun, bad, slang, mad, ill) |
| nougat(noun, bad, slang, mad, ill) |
| nutjob(noun, person, slang, mad, nervous) |
| oddball(noun, crazy, mad, odd, patient) |
| of unsound mind(expression, idiom, silly, foolish, mad) |
| queer(adjective, strange, fool, mad, freak) |
| screw-loose(noun, bad, slang, mad, ill) |