| Term | Definition |
| animosity (N) | hatred, bitter feeling, or ill will |
| antagonism (N) | bitter feelings; hatred, or hostility |
| bellicose (adj) | very aggressive; warlike |
| belligerent (adj) | somebody who fights or argues; antagonistic |
| cantankerous (adj) | quarrelsome and cranky |
| captious (adj) | somebody who quarrels or quibbles; quarrel over minor, unimportant things |
| contentious (adj) | likely to argue or quarrel |
| disputatious (adj) | likely to argue or dispute |
| polemical (adj) | somebody who likes to argue or dispute or debate controversial issues |
| predator (N) | someone who aggressively goes after another person |
| pugnacious (adj) | street fighter; hit below the belt |