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deadly - 20 thesaurus results
| Main Entry: | deadly |
| Part of Speech: | adjective |
| Definition: | causing end of life |
| Synonyms: | baleful, baneful, bloodthirsty, bloody, cannibalistic, cruel, dangerous, deathly, deleterious, destroying, destructive, fatal, grim, harmful, homicidal, injurious, internecine, killing, lethal, malignant, mortal, murderous, noxious, pernicious, pestiferous, pestilent, poisonous, ruthless, savage, suicidal, toxic, unrelenting, venomous, violent, virulent, carcinogenic, death-dealing, mortiferous, pestilential, slaying |
| Notes: | deadly means causing or capable of causing death while deathly means having the physical appearance of death |
| Antonyms: | harmless, healthful, healthy, invigorating, wholesome, animating, energizing |
| Main Entry: | deadly |
| Part of Speech: | adjective |
| Definition: | ghostly |
| Synonyms: | ashen, dead, deathly, ghastly, pallid, wan, white, corpselike, deadened, deathful, deathlike |
| Antonyms: | lively |
| 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 |
| Antonyms: | advantageous, auspicious, favorable, good, helping, promising |
| Main Entry: | baneful |
| Part of Speech: | adjective |
| Definition: | ruinous, injurious |
| Synonyms: | baleful, calamitous, deadly, deleterious, destructive, disastrous, evil, fatal, harmful, hurtful, noxious, pernicious, pestilent, poisonous, venomous, wicked, malefic, pestilential |
| Antonyms: | advantageous, beneficial, fortunate, helpful, lucky, beneficient |
| Main Entry: | calamitous |
| Part of Speech: | adjective |
| Definition: | disastrous; tragic |
| Synonyms: | adverse, deadly, deplorable, devastating, dire, fatal, grievous, harmful, heartbreaking, lamentable, messy, pernicious, regrettable, ruinous, unfavorable, unfortunate, woeful, afflictive, blighting, cataclysmic, catastrophic |
| Antonyms: | blessed, comforting, favorable, fortunate, happy, joyous, wonderful |
| Main Entry: | contagious |
| Part of Speech: | adjective |
| Definition: | communicable |
| Synonyms: | catching, deadly, endemic, epidemic, infectious, pestiferous, poisonous, spreading, epizootic, impartible, inoculable, pestilential, taking, transmissible, transmittable |
| Antonyms: | noncommunicable |
| 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: | homicidal |
| Part of Speech: | adjective |
| Definition: | murderous |
| Synonyms: | bloodthirsty, deadly, lethal, maniacal, violent, slaughterous |
| Main Entry: | hurtful |
| Part of Speech: | adjective |
| Definition: | injurious, cruel |
| Synonyms: | bad, cutting, damaging, dangerous, deadly, deleterious, destructive, detrimental, disadvantageous, distressing, evil, harmful, malicious, mean, mischievous, nasty, nocuous, noxious, ominous, pernicious, poisonous, prejudicial, spiteful, unkind, aching, afflictive, hurting, upsetting, wounding |
| Antonyms: | assisting, harmless, helpful, helping, kind, nice, aiding, relieving |
| Main Entry: | incurable |
| Part of Speech: | adjective |
| Definition: | unfixable, unchangeable |
| Synonyms: | deadly, fatal, hopeless, impossible, irreparable, serious, terminal, cureless, immedicable, inoperable, irrecoverable, irremediable, nowhere to go, out of time, remediless, uncorrectable, unrecoverable |
| Antonyms: | curable, operable, healable, medicable |
| Main Entry: | injurious |
| Part of Speech: | adjective |
| Definition: | hurtful |
| Synonyms: | abusive, adverse, bad, baneful, corrupting, damaging, dangerous, deadly, deleterious, destructive, detrimental, disadvantageous, evil, harmful, iniquitous, insulting, mischievous, nocuous, noxious, opprobrious, pernicious, poisonous, prejudicial, ruinous, slanderous, unhealthy, unjust, wrongful, libeling, nocent, unconducive |
| Antonyms: | assisting, beneficial, constructive, curing, fixing, good, healing, helpful, mending, nice, aiding |
| 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: | 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: | murderous |
| Part of Speech: | adjective |
| Definition: | difficult |
| Synonyms: | arduous, brutal, criminal, cruel, dangerous, deadly, destroying, destructive, devastating, fell, ferocious, harrowing, hellish, killing, lethal, ruinous, savage, strenuous, unpleasant, exhausting, sapping |
| Antonyms: | easy, facile, pleasant |
| Main Entry: | noisome |
| Part of Speech: | adjective |
| Definition: | immoral, bad, offensive |
| Synonyms: | baneful, dangerous, deadly, deleterious, disgusting, fetid, foul, harmful, hurtful, injurious, loathsome, malodorous, mephitic, mischievous, nauseating, noxious, pernicious, pestiferous, poisonous, putrid, rank, repulsive, sickening, sickly, smelly, stinking, unhealthful, unhealthy, unwholesome, vile, yucky*, horrid, insalubrious, insalutary, pestilential, reeking |
| Antonyms: | good, just, moral, upright |
* = informal/non-formal usage
| 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: | pestilent/pestilential |
| Part of Speech: | adjective |
| Definition: | dangerous, |
| Synonyms: | contagious, corrupting, deadly, deleterious, destructive, detrimental, diseased, evil, fatal, infectious, injurious, lethal, mortal, noxious, pernicious, pestiferous, ruinous, troublesome, vicious, contaminating, harmful baneful, tainting |
| Antonyms: | clean, healthy, hygienic, safe, sanitary |
| 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: | ruinous |
| Part of Speech: | adjective |
| Definition: | disastrous, devastating |
| Synonyms: | baleful, baneful, calamitous, damaging, deadly, deleterious, dire, extravagant, fatal, fateful, harmful, hurtful, immoderate, injurious, murderous, noxious, pernicious, suicidal, unfortunate, wasteful, withering, annihilative, cataclysmic, catastrophic, crippling, depleting, draining, exhausting, impoverishing, shattering, wrackful |
| Antonyms: | advantageous, assisting, beneficial, helpful |
| Main Entry: | toxic |
| Part of Speech: | adjective |
| Definition: | poisonous |
| Synonyms: | baneful, deadly, harmful, lethal, mephitic, noxious, pernicious, poison, venomous, virulent, pestilential, septic, toxicant |
| Antonyms: | harmless, nonpoisonous |
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.
