| poisonous(adjective, help, heavy, foul, unhealthy) |
| deadly(adjective, bad, evil, unhealthy, harmful) |
| harmful(adjective, dangerous, injurious, damaging, deadly) |
| noxious(adjective, unhealthy, harmful, dangerous, injurious) |
| venomous(adjective, help, bad, evil, hateful) |
| virulent(adjective, help, unhealthy, harmful, noxious) |
| baneful(adjective, bad, offensive, foul, unhealthy) |
| deleterious(adjective, bad, evil, offensive, foul) |
| lethal(adjective, bad, evil, harmful, dangerous) |
| pernicious(adjective, bad, evil, offensive, foul) |
| destructive(adjective, unhealthy, harmful, dangerous, injurious) |
| fatal(adjective, bad, evil, harmful, dangerous) |
| dangerous(adjective, harmful, injurious, damaging, fatal) |
| detrimental(adjective, bad, evil, offensive, foul) |
| injurious(adjective, bad, harmful, dangerous, damaging) |
| baleful(adjective, bad, evil, harmful, injurious) |
| malignant(adjective, offensive, foul, unhealthy, dangerous) |
| toxicant(adjective, help, poisonous) |
| septic(adjective, unhealthy, unclean, poisonous, insalubrity) |
| mephitic(adjective, help, poisonous, insalubrity) |