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| Main Entry: | |
| Part of Speech: | adjective |
| Definition: | mentally deranged |
| Synonyms: | certifiable, crazy, demented, distracted, flipped-out, insane, lunatic, mad, manic-depressive, mental, non compos mentis, nuts, off one's rocker, over the edge, psycho, psychopathic, schizophrenic, sick, unbalanced, unhinged |
| Main Entry: | insane |
| Part of Speech: | adjective |
| Definition: | mentally ill; foolish |
| Synonyms: | batty, bizarre, cracked, crazed, crazy, cuckoo, daft, demented, derailed, deranged, fatuous, frenzied, idiotic, impractical, irrational, irresponsible, loony, lunatic, mad, maniacal, mental, moonstruck, nuts, nutty, of unsound mind, off one's rocker, out of one's mind, paranoid, preposterous, psychopathic, psychotic, rabid, raging, raving, schizophrenic, screwy, senseless, touched, unhinged, unsettled, wild |
| Notes: | inane means silly, lacking significance or insubstantial; insane means mentally deranged, mad or very foolish |
| Antonyms: | balanced, healthy, rational, reasonable, sane, sound, well |
| Main Entry: | lunatic |
| Part of Speech: | adjective |
| Definition: | crazy, mad |
| Synonyms: | absurd, baked, balmy*, bananas, bonkers*, cracked, crazed, daft, demented, deranged, dippy, flaky*, flipped out, foolish, freaked out, fried, idiotic, insane, irrational, kooky, loco, maniac, maniacal, nonsensical, nutty, preposterous, psyched out, psychotic, schizoid, screwy, stupid, unsound, whacko, zany |
| Antonyms: | healthy, sane, sensible |
* = informal/non-formal usage
| Main Entry: | lunatic |
| Part of Speech: | noun |
| Definition: | person who is crazy, mad |
| Synonyms: | crackpot, crank, cuckoo, demoniac, flake, fruitcake, kook, lamebrain, loon, maniac, neurotic, nut*, paranoid, psycho, psychopath, psychotic, scatterbrain, schizophrenic, sociopathic |
| Antonyms: | sane |
* = informal/non-formal usage
| Main Entry: | mad |
| Part of Speech: | adjective |
| Definition: | crazy, insane |
| Synonyms: | aberrant, absurd, bananas, batty, crazed, cuckoo, daft, delirious, demented, deranged, distracted, fantastic, foolhardy, foolish, frantic, frenetic, frenzied, illogical, imprudent, invalid, irrational, kooky, loony, ludicrous, lunatic, mental, non compos mentis, nonsensical, nutty, of unsound mind, off one's rocker, out of one's mind, preposterous, psychotic, rabid, raving, senseless, unbalanced, unhinged, unreasonable, unsafe, unsound, unstable, wacky* |
| Antonyms: | balanced, ok, rational, reasonable, sane, sound |
* = informal/non-formal usage
| Main Entry: | mad person |
| Part of Speech: | noun |
| Definition: | person who is considered mentally ill |
| Synonyms: | bedlamite, crazy person, demented, deranged, idiot, imbecile, loon, lunatic, maniac, mental case, patient, psycho, psychopath, psychotic, raver, schizophrenic, sociopath |
| Main Entry: | manic/maniacal |
| Part of Speech: | adjective |
| Definition: | overexcited, crazy |
| Synonyms: | berserk, crazed, demented, deranged, excited, flipped, flipped out, freaked out, freaky, frenzied, high*, insane, lunatic, mad, nutty, psychotic, rabid, raving, turned-out, unbalanced, up*, wild |
| Antonyms: | balanced, calm, sane |
* = informal/non-formal usage
| Main Entry: | mental |
| Part of Speech: | adjective |
| Definition: | insane |
| Synonyms: | deranged, disturbed, fruity, loco, lunatic, mad, maniac, mentally ill, mindless, non compos mentis, nuts, nutsy, psychiatric, psychotic, unbalanced, unstable |
| Antonyms: | balanced, sane |
| Main Entry: | psychopath |
| Part of Speech: | noun |
| Definition: | person who is mentally deranged, often prone to hurt others |
| Synonyms: | antisocial personality, insane person, lunatic, mad person, maniac, mental case, nutcase, psycho, psychotic, schizoid, sociopath, unstable personality |
Roget's 21st Century Thesaurus, Third Edition
Copyright © 2013 by the Philip Lief Group.
Cite This Source
Copyright © 2013 by the Philip Lief Group.
Cite This Source
Copyright © 2013 Dictionary.com, LLC. All rights reserved.
