| retaliative |
| retributive |
| retributory |
| ruthless(adjective, mean, evil, nasty, harsh) |
| sardonic |
| savage(adjective, mean, nasty, violent, wild) |
| scandalous(adjective, offensive, unpleasant, vile, wicked) |
| sinful(adjective, bad, evil, nasty, harsh) |
| thoughtless(adjective, person, mean, nasty, negative) |
| uncompassionate(adjective, mean, evil, negative, unkind) |
| biting |
| tart(adjective, irritable) |
| terrible(adjective, unpleasant, vile, wicked, horrible) |
| touchy(adjective, unpleasant, irritable, disagreeable, bad-tempered) |
| treacherous(adjective, rough, nasty, dark, unpleasant) |
| uncharitable(adjective, mean, nasty, cold, ill) |
| vile(adjective, mean, bad, nasty, offensive) |
| wayward(adjective, rude, awkward, vicious, wicked) |
| wretched(adjective, unpleasant, wicked, horrible, disagreeable) |
| Machiavellian(adjective, wicked) |