| Main Entry: | |
| Part of Speech: | adjective |
| Definition: | acting crazy |
| Synonyms: | absurd, balmy, crazed, crazy, daft, demented, deranged, eccentric, erratic, foolish, hare-brained, insane, irrational, loony, lunatic, mad, nuts, nutty, odd, preposterous, screwy, silly, unpredictable, wild, zany* |
| Antonyms: | calm, collected |
| Main Entry: | cuckoo |
| Part of Speech: | adjective |
| Definition: | crazy |
| Synonyms: | batty, clock, daffy, fool, insane, nuts, screwball, silly, wacky |
| Main Entry: | manic |
| Part of Speech: | adjective |
| Definition: | crazy |
| Synonyms: | berserk, crazed, demented, deranged, excited, flipped, flipped out, freaked out, freaky, frenzied, high, hopped up, insane, lunatic, mad, maniacal, nutty, overexcited, psychotic, rabid, raving, turned out, unbalanced, up, wild |
| Notes: | a maniac is an insane person, while manic means affected with or marked by frenzy or mania uncontrolled by reason |
| Antonyms: | sane |
| Main Entry: | mentally ill |
| Part of Speech: | adjective |
| Definition: | unwell in the mind |
| Synonyms: | cracked, crazed, crazy, cuckoo, daft, demented, deranged, insane, loco, loony, lunatic, mad, not of sound mind, nuts, nutty, off one's rocker, out of one's mind, paranoid, psycho, psychopathic, psychotic, schizophrenic, touched, unbalanced |
| Main Entry: | nutty |
| Part of Speech: | adjective |
| Definition: | deranged |
| Synonyms: | absurd, batty, bedlamite, buggy, cockamamie, cracked, crazy, daffy, daft, demented, eccentric, enthusiastic, foolish, gung ho, harebrained, insane, irrational, keen, kooky, loony, lunatic, mad, nuts, potty, ridiculous, touched, unusual, wacky, warm, zealous |
| Antonyms: | sane |
| Main Entry: | psychopathic |
| Part of Speech: | adjective |
| Definition: | psychotic |
| Synonyms: | certifiable, crazed, crazy, demented, deranged, insane, mental*, unbalanced |
| Main Entry: | ranting |
| Part of Speech: | adjective |
| Definition: | raging |
| Synonyms: | angry, insane, mad, raving |
| Main Entry: | troubled |
| Part of Speech: | adjective |
| Definition: | psychologically disturbed |
| Synonyms: | crazy, cuckoo, demented, disturbed, insane, loony, mentally ill, neurotic, nuts, psychopathic, psychotic, unhinged |
| Antonyms: | balanced, sane, sound |
| Main Entry: | undone |
| Part of Speech: | adjective |
| Definition: | distraught |
| Synonyms: | agitated, crazed, crazy, distressed, disturbed, insane, raving, troubled, unbalanced, unglued, unnerved, upset |
| Antonyms: | balanced, sane, sound, untroubled |