| wanton(adjective, mean, severe, harsh, cruel) |
| anti-social(adjective, misanthropic) |
| bloody(adjective, hard, tough, harsh, violent) |
| coldhearted(adjective, person, mean, hard, severe) |
| implacable(adjective, animal, mean, hard, tough) |
| incompatible(adjective, coldhearted) |
| infamous(adjective, behavior, bad behavior, aroused negative) |
| murderous(adjective, hard, tough, harsh, violent) |
| rough(adjective, rude, violent, cruel, vicious) |
| stonyhearted(adjective, coldhearted) |
| tough(adjective, hard, harsh, cruel, grim) |
| unbending(adjective, terrible behavior) |
| uncongenial(adjective, coldhearted) |
| unsparing(adjective, person, mean, severe, harsh) |
| unwarmhearted(adjective, person) |
| animal(adjective, mean, rough, cruel, vicious) |
| bloody-minded |
| brutish(adjective, evil, rough, nasty, harsh) |
| devilish(adjective, animal, mean, violent, cruel) |
| diabolic |