| poisonous(adjective, harmful, dangerous, deadly, lethal) |
| baneful(adjective, bad, evil, harmful, injurious) |
| terminal(adjective, deadly, final, lethal) |
| baleful(adjective, bad, evil, harmful, injurious) |
| calamitous(adjective, help, painful, suffering, dreadful) |
| fateful(adjective, help, important, decide, critical) |
| harmful(adjective, bad, evil, dreadful, dangerous) |
| virulent(adjective, deadly, poisonous, lethal) |
| cataclysmic(adjective, help, painful, suffering, dreadful) |
| malignant(adjective, dangerous, deadly, diseased, lethal) |
| noxious(adjective, bad, evil, harmful, dangerous) |
| toxic(adjective, bad, evil, harmful, dangerous) |
| dangerous(adjective, hazardous, troubling) |
| deathly(adjective, live, dangerous, deadly, lethal) |
| inevitable(adjective, important, critical, deadly, doomed) |
| foreordained(adjective, important, critical, doomed) |
| damaging(adjective, bad, evil, harmful, dangerous) |
| devastating(adjective, bad, evil, wicked, dreadful) |
| dire(adjective, sad, heavy, painful, suffering) |
| hopeless(adjective, disease, pessimistic, futile) |