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malignant - 20 thesaurus results
| Main Entry: | malignant |
| Part of Speech: | adjective |
| Definition: | diseased |
| Synonyms: | cancerous, deadly, destructive, fatal, internecine, lethal, mortal, poisonous, pestilential |
| Antonyms: | benign, harmless, uncancerous |
| Main Entry: | baleful |
| Part of Speech: | adjective |
| Definition: | menacing |
| Synonyms: | calamitous, deadly, dire, evil, foreboding, harmful, hurtful, injurious, malevolent, malignant, noxious, ominous, pernicious, ruinous, sinister, threatening, venomous, vindictive, woeful |
| Notes: | something is baleful that intends or portends harm or injury; something is baneful that produces harm or injury - thus, a glance may be baleful, an herb or poison baneful |
| Antonyms: | advantageous, auspicious, favorable, good, helping, promising |
| Main Entry: | dangerous |
| Part of Speech: | adjective |
| Definition: | hazardous, troubling |
| Synonyms: | alarming, bad, breakneck*, chancy, critical, deadly, delicate, dynamite, exposed, fatal, formidable, hairy*, heavy*, hot*, impending, impregnable, insecure, loaded, malignant, menacing, mortal, nasty, perilous, portentous, precarious, pressing, queasy, risky, serious, serpentine, shaky, speculative, terrible, thorny*, threatening, ticklish*, touch-and-go, touchy, treacherous, ugly*, unhealthy, unsafe, unstable, urgent, viperous, vulnerable, wicked, dangersome, jeopardous, on collision course, parlous |
| Antonyms: | careful, guarded, safe, secure, untroubled, unhazardous |
* = informal/non-formal usage
| Main Entry: | evil |
| Part of Speech: | adjective |
| Definition: | sinful, immoral |
| Synonyms: | angry, atrocious, bad, baneful, base, beastly, calamitous, corrupt, damnable, depraved, destructive, disastrous, execrable, flagitious, foul, harmful, hateful, heinous, hideous, iniquitous, injurious, loathsome, low, malevolent, malicious, malignant, nefarious, obscene, offensive, pernicious, poison, reprobate, repugnant, repulsive, revolting, spiteful, stinking, ugly, unpleasant, unpropitious, vicious, vile, villainous, wicked, wrathful, wrong, maleficent, no good, rancorous |
| Antonyms: | auspicious, decent, good, honest, moral, sinless, upright, virtuous |
| Main Entry: | harmful |
| Part of Speech: | adjective |
| Definition: | injurious, hurtful |
| Synonyms: | adverse, bad, baleful, baneful, calamitous, consumptive, corrupting, damaging, deleterious, destructive, detrimental, dire, disadvantageous, disastrous, evil, incendiary, inimical, internecine, malicious, malignant, menacing, mischievous, murderous, nocuous, noxious, painful, pernicious, pestiferous, risky, ruinous, sinful, sinister, subversive, toxic, unhealthy, unsafe, unwholesome, virulent, cataclysmic, catastrophic, corroding, crippling, harassing, malefic, pestilential, undermining |
| Main Entry: | hostile |
| Part of Speech: | adjective |
| Definition: | antagonistic, mean |
| Synonyms: | adverse, alien, allergic, argumentative, bellicose, belligerent, bitter, catty*, chill*, cold*, competitive, contentious, contrary, dour, hateful, inhospitable, inimical, malevolent, malicious, malignant, militant, nasty, opposed, opposite, ornery*, pugnacious, sour*, spiteful, surly, unfavorable, unfriendly, unkind, unpropitious, unsociable, unsympathetic, viperous, virulent, vitriolic, warlike, anti*, disapproving, ill-disposed, oppugnant, rancorous, scrappy, unwelcoming |
| Antonyms: | agreeable, friendly, gentle, kind, nice, welcoming |
* = informal/non-formal usage
| Main Entry: | inhuman/inhumane |
| Part of Speech: | adjective |
| Definition: | animal, savage |
| Synonyms: | barbaric, barbarous, bestial, brutal, cannibalistic, cold-blooded, cruel, devilish, diabolical, fell, ferocious, fiendish, fierce, grim, hateful, heartless, implacable, malicious, malign, malignant, mean, merciless, pitiless, relentless, remorseless, ruthless, truculent, unfeeling, unkind, unrelenting, unsympathetic, vicious, uncompassionate |
| Antonyms: | animate, human/humane, sensate |
| Main Entry: | lethal |
| Part of Speech: | adjective |
| Definition: | deadly |
| Synonyms: | baleful, dangerous, deathly, destructive, devastating, fatal, harmful, hurtful, malignant, mortal, mortuary, murderous, noxious, pernicious, pestilent, poisonous, virulent, mortiferous, necrotic, pestilential |
| Antonyms: | beneficial, harmless, helpful, life-giving |
| Main Entry: | malevolent |
| Part of Speech: | adjective |
| Definition: | hateful |
| Synonyms: | baleful, catty*, dirty, evil, evil-minded, hellish, hostile, lousy, malicious, malign, malignant, murder, murderous, pernicious, poison, rough, sinister, spiteful, tough, vengeful, vicious, vindictive, waspish, wicked, bad-natured, despiteful, rancorous |
| Antonyms: | amiable, harmless, kind, liking, loving |
* = informal/non-formal usage
| Main Entry: | malicious |
| Part of Speech: | adjective |
| Definition: | hateful |
| Synonyms: | awful, baleful, beastly, bitter, catty*, deleterious, detrimental, envious, evil, evil-minded, green*, green-eyed*, gross*, injurious, jealous, low, malevolent, malign, malignant, mean, mischievous, nasty, noxious, ornery, pernicious, petty, poisonous, spiteful, vengeful, venomous, vicious, virulent, wicked, bad-natured, cussed, despiteful, ill-disposed, rancorous, resentful, uncool |
| Antonyms: | benevolent, friendly, good, kind, sympathetic, thoughtful, likeable |
* = informal/non-formal usage
| Main Entry: | malign |
| Part of Speech: | adjective |
| Definition: | hurtful, injurious |
| Synonyms: | antagonistic, antipathetic, bad, baleful, baneful, deleterious, destructive, detrimental, evil, harmful, hateful, hostile, inimical, malevolent, malignant, noxious, pernicious, sinister, spiteful, vicious, wicked, despiteful, malefic, maleficent, rancorous |
| Antonyms: | benign, helpful, nice, aiding |
| Main Entry: | mischievous |
| Part of Speech: | adjective |
| Definition: | devilish, wicked |
| Synonyms: | arch, artful, bad, bothersome, damaging, dangerous, deleterious, destructive, detrimental, evil, foxy*, frolicsome, harmful, hazardous, holy terror*, hurtful, ill, impish, injurious, insidious, irksome, malicious, malignant, naughty, nocuous, perilous, pernicious, playful, precarious, puckish, rascal, risky, rude, sinful, sly, spiteful, sportive, teasing, tricky, troublesome, vexatious, vicious, wayward, dickens, exasperating, ill-behaved, misbehaving, rascally, vexing |
| Antonyms: | good, nice, obedient, behaved |
* = informal/non-formal usage
| Main Entry: | morbid |
| Part of Speech: | adjective |
| Definition: | gloomy, nasty, sickly |
| Synonyms: | aberrant, abnormal, ailing, dark, deadly, depressed, despondent, diseased, dreadful, frightful, ghastly, ghoulish, grim, grisly, gruesome, hideous, irascible, macabre, malignant, melancholy, monstrous, moody, pessimistic, saturnine, sick, somber, sullen, unhealthy, unnatural, unsound, unusual, unwholesome, brooding, horrid, infected |
| Antonyms: | cheerful, happy, healthy, pleased, sound |
| Main Entry: | opprobrious |
| Part of Speech: | adjective |
| Definition: | abusive, hateful |
| Synonyms: | contemptuous, damaging, defamatory, despicable, disparaging, humiliating, injurious, insolent, insulting, invective, malevolent, malign, malignant, notorious, offensive, pejorative, scandalous, scurrilous, spiteful, truculent, vile, vitriolic, vulgar, abasing, calumniatory, contumelious, debasing, defaming, denigrating, depreciative, derogative, despiteful, detractive, disgracing, dishonoring, hurting, injuring, libeling, maligning, offending, reproaching, reviling, shaming, vituperative |
| Antonyms: | complimentary, flattering, kind, nice, praising |
| Main Entry: | pernicious |
| Part of Speech: | adjective |
| Definition: | bad, hurtful |
| Synonyms: | baleful, damaging, dangerous, deadly, deleterious, destructive, detrimental, devastating, evil, fatal, harmful, iniquitous, injurious, killing, lethal, malevolent, malicious, malign, malignant, mortal, nefarious, noisome, noxious, offensive, pestiferous, pestilent, poisonous, prejudicial, ruinous, sinister, toxic, venomous, virulent, wicked, maleficent, miasmatic, miasmic, pestilential |
| Antonyms: | helpful, innocuous, kind, lovable, loving |
| Main Entry: | poison/poisonous |
| Part of Speech: | adjective |
| Definition: | harmful |
| Synonyms: | bad, baleful, baneful, corrupt, dangerous, deadly, deleterious, destructive, detrimental, evil, fatal, hurtful, lethal, malicious, malignant, mephitic, morbid, mortal, nocuous, noisome, noxious, peccant, pernicious, pestiferous, toxic, venomous, vicious, viperous, virulent, corruptive, infective, miasmatic, pestilential, septic, toxicant, toxiferous |
| Antonyms: | assisting, curing, healing, helpful, aiding, antidotal |
| Main Entry: | sinister |
| Part of Speech: | adjective |
| Definition: | nasty, menacing |
| Synonyms: | adverse, apocalyptic, bad, baleful, baneful, corrupt, deleterious, dire, disastrous, dishonest, disquieting, evil, foreboding, harmful, hurtful, ill-boding, inauspicious, injurious, lowering, malevolent, malign, malignant, mischievous, obnoxious, ominous, pernicious, perverse, poisonous, portentous, threatening, unfavorable, unfortunate, unlucky, unpropitious, woeful, blackhearted, doomful, malefic |
| Antonyms: | benevolent, kind, nice |
| Main Entry: | spiteful |
| Part of Speech: | adjective |
| Definition: | hurtful, nasty |
| Synonyms: | angry, barbed, catty*, cruel, dirty, evil, hateful, ill-natured, malevolent, malicious, malign, malignant, mean, ornery*, snide, venomous, vicious, vindictive, waspish, wicked, accidentally on purpose, cussed, despiteful, ill-disposed, rancorous, spleenful, splenetic |
| Antonyms: | affectionate, forgiving, helpful, loving, pleasing |
* = informal/non-formal usage
| Main Entry: | unfriendly |
| Part of Speech: | adjective |
| Definition: | nasty, hostile |
| Synonyms: | acrimonious, against, alien, aloof, antagonistic, antisocial, censorious, chilly, cold, combative, competitive, conflicting, contrary, disaffected, disagreeable, distant, grouchy, gruff, hateful, inauspicious, inhospitable, inimical, malicious, malignant, misanthropic, opposed, opposite, quarrelsome, sour, spiteful, surly, uncharitable, uncongenial, unfavorable, unpropitious, unsociable, vengeful, warlike, estranged, grudging, ill-disposed, not on speaking terms, unneighborly |
| Antonyms: | approachable, friendly, kind, nice, sociable |
| Main Entry: | unkind |
| Part of Speech: | adjective |
| Definition: | not nice |
| Synonyms: | barbarous, brutal, cold-blooded, cruel, harsh, hateful, heartless, inconsiderate, inhuman, insensitive, malevolent, malicious, malignant, mean, nasty, sadistic, savage, spiteful, thoughtless, uncaring, uncharitable, unfeeling, unfriendly, unsympathetic, coldhearted, hard-hearted, inhumane |
| Antonyms: | considerate, friendly, giving, kind, nice |
Roget's 21st Century Thesaurus, Third Edition
Copyright © 2009 by the Philip Lief Group.
Cite This Source
Copyright © 2009 by the Philip Lief Group.
Cite This Source
Copyright © 2009, Dictionary.com, LLC. All rights reserved.
