Antagonism
Part of speech: noun
Definition: a strong natural dislike or hatred; antipathy
Example sentence: The things journalists should pay attention to are the issues the political leadership agrees on, rather than to their supposed antagonisms.
Hostility
Part of speech: noun
Definition: The state of being hostile;A hostile action, especially a military action. See hostilities for specific plural definition.
Example sentence: I have sworn upon the altar of God, eternal hostility against every form of tyranny over the mind of man.