| irritable(adjective, difficult, aggressive, turbulent, belligerent) |
| cantankerous(adjective, rough, nasty, difficult, dark) |
| unfriendly(adjective, mean, nasty, hostile, antagonistic) |
| choleric(adjective, difficult, irritable, aggressive, turbulent) |
| fighting(verb, nasty, determined, hostile, spirited) |
| hawkish(adjective, energetic, violent, hostile, antagonistic) |
| litigious(adjective, difficult, contrary, turbulent, belligerent) |
| querulous(adjective, difficult, irritable, turbulent, belligerent) |
| rough(adjective, hard, severe, nasty, harsh) |
| savage(adjective, mean, hard, severe, sharp) |
| bloodthirsty(adjective, cruel, vicious, hostile, brutal) |
| confrontational(adjective, difficult, hostile, aggressive, belligerent) |
| ferocious(adjective, hard, rough, harsh, terrible) |
| gladiatorial(difficult, energetic, hostile, antagonistic, aggressive) |
| hard-bitten |
| harsh(adjective, hostile, belligerent, quarrelsome) |
| offensive(adjective, unpleasant, violent, vigorous, disgusting) |
| passionate(adjective, difficult, cruel, vicious, irritable) |
| peevish(adjective, difficult, irritable, turbulent, belligerent) |
| petulant(adjective, difficult, irritable, aggressive, turbulent) |