| slaughterous(adjective, help, grim, grave, killing) |
| barbaric(adjective, violent, cruel, vicious, fierce) |
| gory(adjective, horrible, killing, bloody) |
| merciless(adjective, hard, tough, harsh, violent) |
| mortal(adjective, deadly) |
| cutthroat(adjective, help, strong, violent, grim) |
| killing(adjective, difficult, killing) |
| arduous(adjective, difficult, fatal, mortal, lethal) |
| bestial |
| fatal |
| harsh(adjective, hard, tough, violent, cruel) |
| hellish(adjective, bad, nasty, difficult, harsh) |
| remorseless(adjective, hard, harsh, violent, cruel) |
| sadistic(adjective, harsh, violent, wild, cruel) |
| strenuous(adjective, difficult) |
| wild(adjective, strong, severe, intense, violent) |
| grim(adjective, hard, tough, harsh, violent) |
| harrowing(adjective, difficult) |
| implacable(adjective, hard, tough, harsh, violent) |
| noisome(adjective, bad, offensive, foul, revolting) |