| mental(adjective, silly, foolish, stupid, crazy) |
| neurotic(adjective, insane) |
| out to lunch(expression, adjective, idiom, silly, crazy) |
| potty(adjective, silly, foolish, mad, insane) |
| schizoid(adjective, insane) |
| stark raving mad(expression, adjective, idiom, sane, insanity) |
| wacky(adjective, slang, silly, foolish, crazy) |
| amuck |
| babbling(adjective, insane) |
| balmy(adjective, silly, foolish, crazy, mad) |
| bats in the belfry(expression, idiom, silly, foolish, mad) |
| brain-sick(adjective, insane) |
| corybantic(wild, frantic, frenzied, preoccupied, neurotic) |
| crack-brained(adjective, insane) |
| daffy(adjective, informal, sane) |
| delusional |
| desperate(adjective, cruel, vicious, brutal, aggressive) |
| disordered(adjective, sane) |
| disturbed(verb, adjective, cruel, hot, crazy) |
| eccentric(adjective, silly, foolish, unwise) |