| crazy(adjective, sick, sane, cuckoo, queer) |
| daft(adjective, crazy, unstable, disturbed, sane) |
| demented(adjective, unstable, disturbed, sane, unhinged) |
| insane(adjective, crazy, unstable, disturbed, sane) |
| loco(adjective, crazy, sick, insane, sane) |
| lunatic(adjective, unstable, disturbed, sane, hacked) |
| mad(adjective, unstable, disturbed, sane, unhinged) |
| mental(noun, adjective, slang, sick, mad person) |
| non compos mentis(expression, adjective, idiom, law, unstable) |
| nuts(noun, adjective, slang, crazy, sick) |
| unbalanced(adjective, unstable, disturbed, sane, unhinged) |
| cuckoo(noun, adjective, slang, crazy, sick) |
| deranged(adjective, unstable, disturbed, hacked, unhinged) |
| dotty(adjective, crazy, sick, sane, off) |
| loony(noun, adjective, slang, sick, sane) |
| of unsound mind(expression, adjective, idiom, off, lunatic) |
| psychotic(adjective, unstable, disturbed, erratic, unhinged) |
| touched(adjective, crazy, unstable, disturbed, sane) |
| unhinged(adjective, crazy, unstable, disturbed, cuckoo) |
| batty(adjective, crazy, unstable, disturbed, sane) |