| Main Entry: | |
| Part of Speech: | adjective |
| Definition: | poisonous; hateful |
| Synonyms: | accidentally on purpose, antagonistic, baleful, baneful, catty, cussed, deadly, destructive, dirty, evil, hostile, lethal, malefic, malevolent, malicious, malign, malignant, mean, mephitic, noxious, ornery*, rancorous, savage, spiteful, toxic, toxicant, vicious, vindictive, viperish, viperous, virulent, waspish |
| Antonyms: | kind, praising, unpoisonous |
| Main Entry: | baneful |
| Part of Speech: | adjective |
| Definition: | ruinous, injurious |
| Synonyms: | baleful, calamitous, deadly, deleterious, destructive, disastrous, evil, fatal, harmful, hurtful, malefic, noxious, pernicious, pestilent, pestilential, poisonous, venomous, wicked |
| 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, beneficial, beneficient, fortunate, helpful, lucky |
| Main Entry: | catty |
| Part of Speech: | adjective |
| Definition: | nasty, malicious |
| Synonyms: | backbiting, evil, hateful, ill-natured, malevolent, mean, rancorous, spiteful, venomous, vicious, wicked |
| Antonyms: | kind, nice, pleasant |
| Main Entry: | corrosive |
| Part of Speech: | adjective |
| Definition: | consuming, wearing; bitter |
| Synonyms: | acerb, acerbic, acrid, biting, caustic, corroding, cutting, destructive, erosive, incisive, sarcastic, strongly acid, trenchant, venomous, virulent, wasting |
| Antonyms: | contributing, fortifying, supporting |
| Main Entry: | deadly |
| Part of Speech: | adjective |
| Definition: | causing end of life |
| Synonyms: | baleful, baneful, bloodthirsty, bloody, cannibalistic, carcinogenic, cruel, dangerous, death-dealing, deathly, deleterious, destroying, destructive, fatal, grim, harmful, homicidal, injurious, internecine, killing, lethal, malignant, mortal, mortiferous, murderous, noxious, pernicious, pestiferous, pestilent, pestilential, poisonous, ruthless, savage, slaying, suicidal, toxic, unrelenting, venomous, violent, virulent |
| Notes: | deadly means causing or capable of causing death while deathly means having the physical appearance of death |
| Antonyms: | animating, energizing, harmless, healthful, healthy, invigorating, wholesome |
| Main Entry: | destructive |
| Part of Speech: | adjective |
| Definition: | injurious, devastating |
| Synonyms: | annihilative, baleful, baneful, calamitous, cancerous, cataclysmic, catastrophic, consumptive, cutthroat, damaging, deadly, deleterious, detrimental, dire, disastrous, eradicative, evil, extirpative, fatal, fell, harmful, hurtful, internecine, lethal, lethiferous, mortal, noisome, noxious, pernicious, pestiferous, pestilential, ruinous, slaughterous, suicidal, toxic, venomous, wrackful, wreckful |
| Antonyms: | aiding, assisting, building, creative, helpful, productive |
| Main Entry: | fierce |
| Part of Speech: | adjective |
| Definition: | violent, menacing |
| Synonyms: | angry, animal, ape, awful, barbarous, bloodthirsty, blustery, boisterous, bold, brutal, brutish, cruel, cutthroat, dangerous, enraged, fell, feral, ferocious, fiery, flipped, frightening, furious, horrible, howling, impetuous, infuriated, intense, malevolent, malign, murderous, passionate, powerful, primitive, raging, raving, relentless, savage, stormy, strong, tempestuous, terrible, threatening, tigerish, truculent, tumultous/tumultuous, uncontrollable, untamed, vehement, venomous, vicious, wild |
| Antonyms: | calm, gentle, kind, meek, nonviolent, peaceful, tame, tender, unthreatening |
| Main Entry: | malicious |
| Part of Speech: | adjective |
| Definition: | hateful |
| Synonyms: | awful, bad-natured, baleful, beastly, bitter, catty, cussed, deleterious, despiteful, detrimental, envious, evil, evil-minded, green*, green-eyed, gross*, ill-disposed, injurious, jealous, low, malevolent, malign, malignant, mean, mischievous, nasty, noxious, ornery, pernicious, petty, poisonous, rancorous, resentful, spiteful, uncool, vengeful, venomous, vicious, virulent, wicked |
| Notes: | while malevolent suggests deep and lasting dislike, malicious usually means petty and spiteful |
| Antonyms: | benevolent, friendly, good, kind, likeable, sympathetic, thoughtful |
| Main Entry: | noxious |
| Part of Speech: | adjective |
| Definition: | deadly, injurious |
| Synonyms: | baneful, corrupting, dangerous, deleterious, destructive, detrimental, fetid, foul, harmful, hurtful, insalubrious, insalutary, noisome, pernicious, pestiferous, pestilent, pestilential, poisonous, putrid, sickly, spoiled, stinking, toxic, unhealthful, unhealthy, unwholesome, venomous, virulent |
| Notes: | noxious means injurious to physical or mental health; obnoxious means very offensive, objectionable, or unpleasant |
| Antonyms: | curing, good, healthy, helpful, hygienic, pure, sterile, wholesome |