| intransigent(adjective, determined, resolute, obstinate, stubborn) |
| loath(adjective, difficult, awkward, hostile, hesitant) |
| mismatched(adjective, distant, distinct, different, distinctive) |
| noncooperative(adjective, sullen, unwilling) |
| obverse(noun, reverse, antagonistic, adverse, conflicting) |
| opponent |
| persistent(adjective, determined, fixed, obstinate, stubborn) |
| petulant(adjective, mean, severe, difficult, cross) |
| recusant(adjective, bad, weak, wicked, immoral) |
| relentless(adjective, determined, resolute, persistent, obstinate) |
| repugnant(adjective, bad, unfriendly, antagonistic, adverse) |
| rival(adjective, hostile, different, antagonistic, opposite) |
| separate(adjective, unusual, reverse, distinct, different) |
| set(adjective, determined, resolute, persistent, obstinate) |
| stiff(adjective, determined, resolute, obstinate, uncompromising) |
| sulky(adjective, sullen) |
| sullen(adjective, sullen) |
| surly(adjective, mean, nasty, difficult, rude) |
| tough(adjective, difficult, determined, resolute, obstinate) |
| troublesome(adjective, difficult, unpleasant, negative, critical) |