| Term | Definition |
| animosity | hatred; ill will |
| antagonism | hatred or hostility |
| bellicose | of a quarrelsome nature; eager to fight; warlike; belligerent |
| belligerent | taking part in war or fighting ready to fight |
| cantankerous | bad-tempered; quarrelsome |
| captious | made for the sake of quarreling; quibbling |
| contentious | quarrelsome; belligerent |
| disputatious | likely to dispute or argue |
| polemical | inclined to argue or debate; controversial |
| predator | one who takes advantage of another, exploits or feeds on another; a |
| pugnacious | eager to fight; belligerent |