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dangerous - 20 thesaurus results
| 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: | adventurous |
| Part of Speech: | adjective |
| Definition: | daring, risk-taking |
| Synonyms: | audacious, bold, brave, courageous, dangerous, daredevil, enterprising, foolhardy, hazardous, headstrong, intrepid, rash, reckless, risky, temerarious, venturesome, adventuresome, venturous |
| Notes: | adventurous may be predicated of both a person and an undertaking and implies a willingness to accept risks but not necessarily imprudence; adventuresome is predicated only of a person |
| Antonyms: | careful, cautious, prudent, unadventurous |
| Main Entry: | catching |
| Part of Speech: | adjective |
| Definition: | contagious (disease) |
| Synonyms: | communicable, dangerous, endemic, epidemic, infectious, pestiferous, transferable, epizootic, infective, miasmatic, pandemic, pestilential, taking, transmittable |
| Antonyms: | uncontagious |
| Main Entry: | dicey |
| Part of Speech: | adjective |
| Definition: | risky |
| Synonyms: | capricious, chancy, dangerous, difficult, erratic, iffy*, incalculable, ticklish, tricky, uncertain, unpredictable, whimsical, fluctuant |
| Antonyms: | certain, safe, sure |
* = informal/non-formal usage
| Main Entry: | exciting |
| Part of Speech: | adjective |
| Definition: | inspiring, exhilarating |
| Synonyms: | appealing, astonishing, bracing, breathtaking, dangerous, dramatic, eye-popping*, far-out*, fine, flashy, groovy*, hair-raising*, heady*, hectic, impressive, interesting, intoxicating, intriguing, lively, melodramatic, mind-blowing, moving, neat, overpowering, overwhelming, provocative, racy, rousing, sensational, showy, spine-tingling*, stimulating, stirring, thrilling, wild, agitative, animating, arousing, arresting, commoving, electrifying, exhilarant, impelling, rip-roaring, titillating, zestful |
| Antonyms: | boring, moderate, unenthusiastic, unexciting, unenthused, uninspiring, unpromising, unstimulating |
* = informal/non-formal usage
| Main Entry: | fierce |
| Part of Speech: | adjective |
| Definition: | violent, menacing |
| Synonyms: | angry, animal, ape, awful, barbarous, bloodthirsty, blustery, boisterous, bold, brutal, cruel, cutthroat*, dangerous, enraged, fell, feral, ferocious, fiery, frightening, furious, horrible, impetuous, infuriated, intense, malevolent, malign, murderous, passionate, powerful, primitive, raging, raving, relentless, savage, stormy, strong, tempestuous, terrible, threatening, truculent, tumultous/tumultuous, uncontrollable, untamed, vehement, venomous, vicious, wild, brutish, flipped, howling, tigerish |
| Antonyms: | calm, gentle, kind, meek, nonviolent, peaceful, tame, tender, unthreatening |
* = informal/non-formal usage
| 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: | incendiary |
| Part of Speech: | adjective |
| Definition: | causing trouble, damage |
| Synonyms: | dangerous, inflammatory, malevolent, provocative, seditious, subversive, treacherous, wicked, demagogic, dissentious, rabble-rousing |
| Antonyms: | peacemaking |
| Main Entry: | inflammable |
| Part of Speech: | adjective |
| Definition: | ready to burn |
| Synonyms: | combustible, dangerous, flammable, hazardous, incendiary, risky, unsafe, burnable, ignitable |
| Antonyms: | fire-proof, incombustible, non-flammable, non-inflammable |
| 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: | insidious |
| Part of Speech: | adjective |
| Definition: | sneaky, tricky |
| Synonyms: | Machiavellian, artful, astute, corrupt, crafty, crooked, cunning, dangerous, deceitful, deceptive, deep, designing, dishonest, disingenuous, duplicitous, false, foxy, intriguing, perfidious, perilous, secret, slick, sly, smooth, snaky*, stealthy, subtle, surreptitious, treacherous, wily, wormlike, ensnaring, guileful, like a snake in the grass, sneaking |
| Antonyms: | fair, honest, open, sincere |
* = informal/non-formal usage
| 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: | menacing |
| Part of Speech: | adjective |
| Definition: | intimidating, ominous |
| Synonyms: | alarming, approaching, dangerous, frightening, imminent, impending, looming, lowering, threatening, intimidatory, louring, minacious, minatory, overhanging |
| Antonyms: | assisting, helping, aiding, unthreatening |
| 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: | 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: | noxious |
| Part of Speech: | adjective |
| Definition: | deadly, injurious |
| Synonyms: | baneful, corrupting, dangerous, deleterious, destructive, detrimental, fetid, foul, harmful, hurtful, noisome, pernicious, pestiferous, pestilent, poisonous, putrid, sickly, spoiled, stinking, toxic, unhealthful, unhealthy, unwholesome, venomous, virulent, insalubrious, insalutary, pestilential |
| Antonyms: | curing, good, healthy, helpful, hygienic, pure, sterile, wholesome |
| Main Entry: | ominous |
| Part of Speech: | adjective |
| Definition: | menacing, foreboding |
| Synonyms: | apocalyptic, baleful, baneful, dangerous, dark, dire, direful, dismal, doomed, fateful, fearful, forbidding, gloomy, grim, haunting, hostile, ill-boding, ill-fated, impending, inauspicious, inhospitable, lowering, malign, perilous, portentous, prescient, prophetic, sinister, suggestive, threatening, unfriendly, unlucky, unpropitious, augural, clouded, doomful, malefic, malificent, minatory, precursive, premonitory, presaging, unpromising |
| Antonyms: | auspicious, happy, lucky, promising, propitious |
| 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 |
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.
