| Main Entry: | |
| 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 |
| 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, maleficent, malevolent, malicious, malign, malignant, miasmatic, miasmic, mortal, nefarious, noisome, noxious, offensive, pestiferous, pestilent, pestilential, poisonous, prejudicial, ruinous, sinister, toxic, venomous, virulent, wicked |
| Antonyms: | helpful, innocuous, kind, lovable, loving |
| Main Entry: | poison/poisonous |
| Part of Speech: | adjective |
| Definition: | harmful |
| Synonyms: | bad, baleful, baneful, corrupt, corruptive, dangerous, deadly, deleterious, destructive, detrimental, evil, fatal, hurtful, infective, lethal, malicious, malignant, mephitic, miasmatic, morbid, mortal, nocuous, noisome, noxious, peccant, pernicious, pestiferous, pestilential, septic, toxic, toxicant, toxiferous, venomous, vicious, viperous, virulent |
| Antonyms: | aiding, antidotal, assisting, curing, healing, helpful |
| Main Entry: | putrid |
| Part of Speech: | adjective |
| Definition: | rotten, stinking |
| Synonyms: | bad, contaminated, corrupt, decayed, decomposed, fetid, foul, high, malodorous, moldered, nidorous, noisome, off, putrefied, rancid, rank, reeking, rotting, smelly, spoiled, strong, tainted, whiffy |
| Antonyms: | fresh, perfumed, sweet |
| Main Entry: | rancid |
| Part of Speech: | adjective |
| Definition: | rotten, strong-smelling |
| Synonyms: | bad, carious, contaminated, curdled, decomposing, disagreeable, disgusting, evil-smelling, feculent, fetid, foul, frowzy, fusty, gamy, high, impure, loathsome, malodorous, moldy, musty, nasty, nidorous, noisome, noxious, off, offensive, olid, polluted, putrefactive, putrefied, putrescent, putrid, rank, reeky, repulsive, sharp, smelly, sour, soured, stale, stinking, strong, tainted, turned, unhealthy, whiffy |
| Antonyms: | perfumed, sweet |
| Main Entry: | rank |
| Part of Speech: | adjective |
| Definition: | stinking, foul |
| Synonyms: | bad, dank, disagreeable, disgusting, evil-smelling, feculent, fetid, funky*, fusty, gamy, graveolent, gross*, high, humid, loathsome, mephitic, moldy, musty, nasty, nauseating, noisome, noxious, obnoxious, off, offensive, olid, pungent, putrescent, putrid, rancid, reeking, repulsive, revolting, smelly, sour, stale, strong, strong-smelling, tainted, turned |
| Antonyms: | aromatic, perfumed, sweet |
| Main Entry: | repugnant |
| Part of Speech: | adjective |
| Definition: | bad, obnoxious; hostile |
| Synonyms: | abhorrent, abominable, adverse, against, alien, antagonistic, antipathetic, averse, conflicting, contradictory, counter, creepy*, different, disagreeable, disgusting, distasteful, extraneous, extrinsic, foreign, foul, hateful, horrid, in opposition, incompatible, inconsistent, inconsonant, inimical, invidious, loathsome, nasty, nauseating, noisome, objectionable, odious, offensive, opposed, opposite, repellent, revolting, revulsive, sickening, unconformable, unfitted, unfriendly, vile |
| Antonyms: | friendly, good, nice, pleasant |
| Main Entry: | repulsive |
| Part of Speech: | adjective |
| Definition: | very disgusting, offensive |
| Synonyms: | abhorrent, abominable, animal*, creepy*, disagreeable, distasteful, forbidding, foul, gross, hateful, hideous, horrid, loathsome, nasty, nauseating, noisome, objectionable, obnoxious, odious, off-putting, pugnacious, repellent, revolting, sickening, sleazy*, ugly, undesirable, unpleasant, unsightly, vile |
| Notes: | repulsive describes a characteristic of a person or object; repellent describes an impression projected by a person or object - a person is repulsive, while a person's behavior is repellent |
| Antonyms: | attractive, enchanting, inviting, pleasing |
| Main Entry: | revolting |
| Part of Speech: | adjective |
| Definition: | disgusting, nauseating |
| Synonyms: | abhorrent, abominable, appalling, awful, distasteful, foul, gross, horrible, horrid, loathsome, nasty, nauseous, noisome, obnoxious, obscene, offensive, repellent, repugnant, repulsive, rotten, shocking, sickening, sleazy*, vile |
| Antonyms: | delightful, good, nice, pleasant, pleasing |