| feral(adjective, mean, severe, harsh, cruel) |
| ferocious(adjective, mean, harsh, cruel, vicious) |
| flinty |
| gratuitous(adjective, mean, severe, harsh, cruel) |
| grim(adjective, mean, severe, harsh, cruel) |
| hard-hearted(adjective, mean, severe, harsh, cruel) |
| hatchet job(expression, adjective, mean, severe, harsh) |
| having a killer instinct(expression, adjective, idiom, mean, severe) |
| implacable(adjective, mean, hard, severe, harsh) |
| inclement |
| inhuman(adjective, mean, hard, harsh, cold) |
| iron-fisted(adjective, mean, severe, harsh, cruel) |
| ironfisted(adjective, mean, severe, harsh, cruel) |
| killer(adjective, mean, severe, harsh, cruel) |
| killer instinct(expression, adjective, mean, hard, harsh) |
| mean(adjective, hard, severe, harsh, cold) |
| mean machine(expression, adjective, mean, severe, harsh) |
| mortal(adjective, mean, severe, harsh, cruel) |
| obdurate(adjective, mean, hard, harsh, cold) |
| savage(adjective, mean, hard, harsh, cold) |