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fatal - 20 thesaurus results
| Main Entry: | fatal |
| Part of Speech: | adjective |
| Definition: | deadly, lethal |
| Synonyms: | baleful, baneful, calamitous, deathly, destructive, disastrous, fateful, final, ill-fated, incurable, inevitable, killing, malignant, mortal, noxious, pernicious, pestilent, poisonous, ruinous, terminal, virulent, cataclysmic, catastrophic, ill-starred, malefic, mortiferous, pestilential |
| Notes: | use fatal for something which has caused someone's death; use lethal for something which is capable of killing someone |
| Antonyms: | healthful, nourishing, vital, wholesome, life-giving |
| Main Entry: | fatal |
| Part of Speech: | adjective |
| Definition: | critical, very important |
| Synonyms: | crucial, decisive, destined, determining, doomed, fateful, final, inevitable, unlucky, foreordained, predestined |
| Antonyms: | trivial, unimportant, unnecessary |
| 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: | 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: | disastrous |
| Part of Speech: | adjective |
| Definition: | detrimental, devastating |
| Synonyms: | adverse, calamitous, destructive, dire, dreadful, fatal, fateful, hapless, harmful, ill-fated, luckless, ruinous, terrible, tragic, unfavorable, unfortunate, unlucky, unpropitious, untoward, cataclysmal, cataclysmic, catastrophic, ill-starred |
| Antonyms: | blessed, fortunate, lucky, miraculous, prosperous, successful, triumphant, winning, wondrous |
| Main Entry: | hopeless |
| Part of Speech: | adjective |
| Definition: | futile, pessimistic |
| Synonyms: | bad, cynical, dejected, demoralized, despairing, desperate, despondent, disconsolate, discouraging, downhearted, fatal, forlorn, gone*, helpless, ill-fated, impossible, impracticable, incurable, irreparable, irrevocable, lost, menacing, pointless, sad, sinister, threatening, tragic, unavailing, unfortunate, useless, vain, woebegone, beyond recall, goner, in despair, irredeemable, irreversible, no-win, past hope, shot down, sunk, unachievable, unmitigable, up the creek, worsening |
| Antonyms: | auspicious, bright, encouraging, expectant, hopeful, optimistic, promising, propitious, rosy |
* = informal/non-formal usage
| 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: | 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: | malignant |
| Part of Speech: | adjective |
| Definition: | diseased |
| Synonyms: | cancerous, deadly, destructive, fatal, internecine, lethal, mortal, poisonous, pestilential |
| Antonyms: | benign, harmless, uncancerous |
| 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: | terminal |
| Part of Speech: | adjective |
| Definition: | final, deadly |
| Synonyms: | check out*, eventual, extreme, fatal, hindmost, incurable, killing, lag, last, latest, latter, lethal, mortal, period, ultimate, utmost, bounding, closing, concluding, limiting, on way out |
| Antonyms: | beginning, initial, opening, starting, reviving |
* = informal/non-formal usage
| Main Entry: | tragic |
| Part of Speech: | adjective |
| Definition: | catastrophic, very bad |
| Synonyms: | adverse, appalling, awful, calamitous, deadly, deathly, deplorable, desolate, destructive, dire, disastrous, doleful, dreadful, fatal, fateful, forlorn, grievous, grim, hapless, harrowing, heartbreaking, ill-fated, lamentable, miserable, mournful, painful, pathetic, pitiful, ruinous, sad, shocking, sorrowful, terrible, unfortunate, unhappy, woeful, wretched, anguished, cataclysmic, crushing, heart-rending, ill-starred, pitiable |
| Antonyms: | advantageous, blessed, good, happy, successful |
| Main Entry: | damning |
| Part of Speech: | adjective |
| Definition: | damaging |
| Synonyms: | fatal, incriminating, ruinous, damnatory |
| Main Entry: | pestilent |
| Part of Speech: | adjective |
| Definition: | dangerous |
| Synonyms: | baneful, contagious, corrupting, deadly, deleterious, destructive, detrimental, diseased, evil, fatal, harmful, infectious, injurious, lethal, mortal, noxious, pernicious, pestiferous, ruinous, troublesome, vicious, contaminating, pestilential, tainting |
| Main Entry: | 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, poison, toxic, venomous, vicious, viperous, virulent, corruptive, infective, miasmatic, pestilential, septic, toxicant, toxiferous |
| Antonyms: | benevolent, harmless, non-toxic |
| 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 |
| Antonyms: | harmless, healthful, healthy, invigorating, wholesome, animating, energizing |
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.
