| hatchet job(expression, adjective, mean, severe, harsh) |
| having a killer instinct(expression, adjective, idiom, mean, severe) |
| hostile(adjective, coldhearted) |
| impenitent(adjective, hard, tough, harsh, cruel) |
| indifferent |
| inflexible |
| inhospitable(adjective, coldhearted) |
| intolerant(adjective, hard, tough, harsh, cruel) |
| intransigent |
| iron-fisted(adjective, mean, severe, harsh, cruel) |
| ironfisted(adjective, mean, harsh, cruel, vicious) |
| killer(adjective, mean, harsh, cruel, vicious) |
| lupine(adjective, violent, cruel, vicious, fierce) |
| malevolent(adjective, mean, harsh, cruel, vicious) |
| malign(adjective, coldhearted) |
| mean machine(expression, adjective, mean, severe, harsh) |
| nasty |
| predatory(adjective, violent, cruel, vicious, fierce) |
| rapacious(adjective, violent, cruel, vicious, fierce) |
| ravening(adjective, violent, cruel, vicious, fierce) |