| nuts(noun, adjective, slang, crazy) |
| bonkers(adjective, slang, informal, crazy) |
| crazy(adjective, informal, sick, insane) |
| lunatic(adjective, crazy, insane, irrational) |
| nutty(noun, adjective, slang, crazy) |
| insane(adjective, crazy, irrational, sane) |
| unbalanced(adjective, crazy, insane, irrational) |
| deranged(adjective, crazy, insane, irrational) |
| bananas(adjective, slang, crazy, sane) |
| non compos mentis(expression, adjective, idiom, law) |
| daffy(adjective, slang, informal, crazy) |
| fruity(adjective, slang, insane, sane) |
| maniac(adjective, crazy, sick, insane) |
| psychotic(adjective, crazy, insane, crazed) |
| irrational(adjective, crazy, insane, distracted) |
| unsound(adjective, crazy, sick, insane) |
| cockamamie(adjective, slang, crazy) |
| dippy(adjective, slang, crazy) |
| disturbed(crazy, sick, insane, psychiatric) |
| eccentric(adjective, crazy, off, dotty) |