| toxic(adjective, help, heavy, foul, unhealthy) |
| venomous(adjective, help, mean, bad, nasty) |
| malignant(adjective, mean, bad, evil, nasty) |
| noxious(adjective, mean, bad, nasty, offensive) |
| virulent(adjective, help, mean, bad, nasty) |
| deadly(adjective, bad, offensive, foul, disgusting) |
| lethal(adjective, bad, harmful, dangerous, deadly) |
| pernicious(adjective, mean, bad, evil, nasty) |
| fatal(adjective, harmful, dangerous, deadly, lethal) |
| baneful(adjective, offensive, foul, disgusting, unhealthy) |
| harmful(adjective, bad, evil, offensive, cruel) |
| dangerous(adjective, bad, offensive, violent, wild) |
| baleful(adjective, mean, bad, evil, nasty) |
| deleterious(adjective, mean, bad, evil, nasty) |
| destructive(adjective, bad, cruel, unkind, harmful) |
| nasty(adjective, mean, bad, taste, attitude) |
| vicious(adjective, mean, bad, evil, nasty) |
| injurious(adjective, mean, bad, evil, nasty) |
| malicious(adjective, mean, bad, evil, nasty) |
| bad(adjective, evil, nasty, offensive, violent) |