HOSTILITY

n. enmity, animosity, antagonism, hatred; hostile act; resistance

Hostility is a form of angry internal rejection or denial in psychology. It is a part of personal construct psychology, developed by George Kelly. In everyday speech it is more commonly used as a synonym for anger and aggression.In psychological terms, Kelly defined hostility as the willful refusal to accept evidence that one's perceptions of the world are wrong. Instead of reconsidering, the hostile person attempts to force or coerce the world to fit their view, even if this is a forlorn hope, and however harmful the cost.
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Hostility, n the tendency of an organism to threaten harm to another or to itself. [more]Hostility - Community and Resources

Noun
1. a hostile (very unfriendly) disposition; "he could not conceal his hostility"
(synonym) ill will
(hypernym) unfriendliness
(hyponym) virulence, virulency
2. a state of deep-seated ill-will
(synonym) enmity, antagonism
(hypernym) state
(hyponym) latent hostility, tension
3. the feeling of a hostile person; "he could no longer contain his hostility"
(synonym) enmity, ill will
(hypernym) hate, hatred
(hyponym) animosity, animus, bad blood
4. violent action that is hostile and usually unprovoked
(synonym) aggression
(hypernym) action
(hyponym) meat grinder
5. acts of overt warfare; "the outbreak of hostilities"
(synonym) belligerency
(hypernym) combat, armed combat

(n.)
State of being hostile; public or private enemy; unfriendliness; animosity.
  

(n.)
An act of an open enemy; a hostile deed; especially in the plural, acts of warfare; attacks of an enemy.