| revenge |
| revenging |
| rough(adjective, nasty, vicious, wicked, hateful) |
| rugged(adjective, tough, harsh, grim, painful) |
| severe(adjective, tough, harsh, cruel, grim) |
| sour(adjective, nasty, cold, hostile, aloof) |
| stern(adjective, tough, harsh, cruel, grim) |
| strict(adjective, tough, harsh, cruel, grim) |
| stringent(adjective, tough, harsh, cruel, grim) |
| surly(adjective, nasty, cold, hostile, aloof) |
| thick-skinned(adjective, tough, harsh, cruel, grim) |
| tit-for-tat(adjective, reactive, reciprocal, vindictive, retaliatory) |
| tough(adjective, nasty, harsh, vicious, wicked) |
| tyrannous(adjective, severe, harsh, cruel, monstrous) |
| uncharitable(adjective, nasty, cold, hostile, aloof) |
| uncongenial(adjective, nasty, cold, hostile, aloof) |
| uncool(adjective, mean, nasty, vicious, wicked) |
| unfavorable(adjective, nasty, cold, hostile, aloof) |
| unjust(adjective, tough, harsh, cruel, grim) |
| unkindhearted |