| inimical(adjective, offensive, negative, foul, unhealthy) |
| malefic(adjective, negative, harmful, threatening, injurious) |
| pestilent(adjective, harmful, dangerous, fatal, poisonous) |
| vicious(adjective, mean, bad, evil, nasty) |
| devastating(adjective, bad, evil, wicked, harmful) |
| disturbing(adjective, harmful, threatening, unfavorable, ominous) |
| foul(offensive, disgusting, unhealthy, harmful, poisonous) |
| malevolent(adjective, mean, bad, wrong, evil) |
| narcotic |
| sinister(adjective, bad, evil, nasty, negative) |
| unfavorable(adjective, harmful, threatening, damaging, ominous) |
| cataclysmic(adjective, harmful, injurious, damaging, deadly) |
| corruptive |
| nasty(adjective, mean, evil, cruel, hateful) |
| pestiferous(adjective, bad, evil, harmful, injurious) |
| unhealthful(adjective, offensive, foul, disgusting, unhealthy) |
| violent |
| pestilential(adjective, bad, evil, harmful, injurious) |
| corroding(injurious, damaging, destructive) |
| corrupting(distressing, harmful, injurious, damaging, destructive) |