| venomous(adjective, hateful) |
| catty(adjective, mean, nasty, dirty, unfriendly) |
| malevolent(adjective, mean, nasty, unfriendly, hateful) |
| nasty(adjective, mean, bad, heavy, unfriendly) |
| poisonous(adjective, malicious, harmful, venomous) |
| spiteful(adjective, mean, nasty, unfriendly, hateful) |
| virulent(adjective, mean, bad, evil, nasty) |
| baneful |
| bitter(adjective, mean, nasty, unfriendly, hateful) |
| evil(adjective, malicious, venomous) |
| hostile(adjective, mean, unfriendly, angry, antagonistic) |
| malignant(adjective, mean, bad, evil, nasty) |
| mean(adjective, nasty, dirty, unfriendly, hateful) |
| ornery(adjective, mean, nasty, dirty, unfriendly) |
| resentful(adjective, hostile, angry, malicious, offended) |
| snaky |
| toxic |
| vicious(adjective, malicious, venomous) |
| viperine |
| viperish |