Aggression

n. hostile behavior; attack, offensive

For other usage, see Aggression (war crime) In psychology and other social and behavioral sciences, aggression refers to behavior that is intended to cause harm or pain. Aggression can be either physical or verbal. Behavior that accidentally causes harm or pain is not aggression. Property damage and other destructive behavior may also fall under the definition of aggression. Aggression is not the same thing as assertiveness.
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Aggression /ag·gres·sion/ behavior leading to self-assertion; it may arise from innate drives and/or a response to frustration, and may be [more]Aggression - Community and Resources

Noun
1. a disposition to behave aggressively
(hypernym) unfriendliness
2. a feeling of hostility that arouses thoughts of attack
(synonym) aggressiveness
(hypernym) hostility, enmity, ill will
3. violent action that is hostile and usually unprovoked
(synonym) hostility
(hypernym) action
(hyponym) meat grinder
(derivation) attack, aggress
4. the act of initiating hostilities
(hypernym) combat, armed combat
(part-holonym) war, warfare
(derivation) attack, aggress
5. deliberately unfriendly behavior
(hypernym) behavior, behaviour, conduct, doings
(hyponym) aggravation, irritation, provocation

n. aggression, hostile behavior; attack, offensive