| vicious(adjective, mean, hard, evil, rough) |
| hard-hearted(adjective, mean, hard, tough, severe) |
| barbaric(adjective, animal, mean, rude, violent) |
| severe(adjective, appearance, mean, hard, tough) |
| unpitying(adjective, mean, severe, harsh, cruel) |
| uncompassionate(adjective, animal, mean, hard, tough) |
| bloodthirsty(adjective, severe, evil, nasty, harsh) |
| brutish(adjective, evil, nasty, harsh, rude) |
| implacable(adjective, animal, appearance, mean, hard) |
| inexorable(adjective, appearance, mean, hard, tough) |
| unforgiving(adjective, mean, hard, tough, severe) |
| inhumane(adjective, animal, mean, hard, tough) |
| tough(adjective, strong, hard, severe, rough) |
| unyielding(adjective, appearance, mean, strong, hard) |
| sadistic(adjective, mean, evil, nasty, harsh) |
| unkind(adjective, animal, mean, hard, tough) |
| fiendish(adjective, animal, mean, nasty, cruel) |
| grim(adjective, animal, appearance, mean, hard) |
| insensitive(adjective, hard, tough, severe, harsh) |
| stern(adjective, appearance, mean, hard, severe) |