| mischievous(adjective, mean, nasty, vicious, wicked) |
| murder(adjective, nasty, vicious, wicked, hateful) |
| murderous(adjective, nasty, vicious, wicked, hateful) |
| not on speaking terms(expression, adjective, idiom, nasty, cold) |
| noxious(adjective, mean, nasty, wicked, hateful) |
| obdurate(adjective, tough, harsh, cruel, grim) |
| opposed(adjective, nasty, cold, hostile, aloof) |
| opposite(adjective, nasty, cold, hostile, aloof) |
| ornery(adjective, mean, nasty, hateful, malicious) |
| penal |
| penitentiary |
| perverse(adjective, tough, harsh, cruel, grim) |
| petty(adjective, mean, nasty, vicious, wicked) |
| poison(adjective, nasty, vicious, wicked, hateful) |
| poisonous(adjective, mean, nasty, vicious, wicked) |
| quarrelsome(adjective, nasty, cold, hostile, aloof) |
| reactive(adjective, reciprocal, tit-for-tat, retaliatory) |
| reciprocal(adjective, reactive, tit-for-tat, retaliatory) |
| remorseless(adjective, severe, harsh, cruel, brutal) |
| retaliating hating(expression, adjective, reactive, reciprocal, vindictive) |