| unmerciful(adjective, severe, harsh, cruel) |
| vicious(adjective, mean, evil, nasty, harsh) |
| acrimonious(adjective, tough, nasty, harsh, cold) |
| bad-natured(adjective, mean, nasty, vicious, wicked) |
| baleful(adjective, mean, nasty, vicious, wicked) |
| bestial(adjective, severe, evil, nasty, harsh) |
| bloodthirsty(adjective, severe, evil, nasty, harsh) |
| brutal(adjective, tough, severe, evil, nasty) |
| brutish(adjective, evil, nasty, harsh, vicious) |
| callous(adjective, tough, evil, nasty, harsh) |
| cold(adjective, tough, nasty, harsh, cruel) |
| cold-blooded(adjective, tough, evil, nasty, harsh) |
| corrective |
| degenerate(adjective, evil, nasty, harsh, vicious) |
| demoniac(adjective, evil, nasty, harsh, vicious) |
| depraved(adjective, evil, nasty, harsh, vicious) |
| disagreeable(adjective, tough, nasty, harsh, cold) |
| evil(adjective, mean, nasty, harsh, vicious) |
| evil-minded(adjective, mean, nasty, vicious, wicked) |
| excruciating(adjective, evil, nasty, harsh, vicious) |