| alien(adjective, mean, nasty, unfriendly, hateful) |
| antithetical(adjective, negative, hostile, antagonistic, contrary) |
| conflicting(adjective, negative, hostile, antagonistic, contrary) |
| converse(adjective, negative, hostile, contrary, adverse) |
| dissentient(noun, adjective, opposition, negative, hostile) |
| enemy(noun, adjective, opposition, hostile, counter) |
| foe(noun, person, informal, match, opposition) |
| match(noun, opposition, rival, opponent, enemy) |
| obstinate(adjective, negative, hostile, different, adverse) |
| opposer(noun, match, opposition, rival, opponent) |
| opposing(adjective, preposition, hostile, different, antagonistic) |
| oppositional(adjective, informal, hostile, antagonistic, contrary) |
| perverse(adjective, negative, hostile, different, antagonistic) |
| unfavorable(adjective, mean, bad, weak, nasty) |
| unfriendly(adjective, mean, nasty, hateful, bitter) |
| adversative |
| antithetic(adjective, counter, unfriendly, antagonistic, contrary) |
| antonymous(adjective, hostile, counter, different, antagonistic) |
| at cross-purposes(expression, adjective, hostile, counter, unfriendly) |
| certainly not pro(expression, idiom) |