"aggression" in the noun sense
1. aggression
a disposition to behave aggressively
2. aggression, aggressiveness
a feeling of hostility that arouses thoughts of attack
3. aggression, hostility
violent action that is hostile and usually unprovoked
4. aggression
the act of initiating hostilities
5. aggression
deliberately unfriendly behavior
Source: WordNet® (An amazing lexical database of English)
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