| certifiable(adjective, psychotic) |
| neurotic(adjective, troubled, cuckoo) |
| daft(adjective, silly, foolish, stupid) |
| bonkers |
| cracked(adjective, silly, foolish, stupid, irrational) |
| crazed(adjective, silly, foolish, stupid, irrational) |
| foolish(adjective, silly, stupid, crazy, hysterical) |
| idiotic(adjective, silly, foolish, stupid) |
| loony(adjective, silly, foolish, stupid, crazy) |
| non compos mentis(expression, adjective, idiom, crazy, hysterical) |
| nutty(adjective, silly, foolish, stupid) |
| of unsound mind(expression, adjective, idiom, foolish, stupid) |
| raving(adjective, wrong, wild, silly, foolish) |
| schizoid(crazy, hysterical, psychotic) |
| schizophrenic(wrong, wild, silly, foolish, stupid) |
| touched(adjective, silly, foolish, stupid) |
| unhinged(adjective, silly, foolish, stupid, cuckoo) |
| around the bend(expression, idiom, wrong, wild) |
| bananas(crazy, hysterical, psychotic) |
| barmy |