A violent hatred giving rise to open and violent retaliation. Also a state of being in which "violent temper" cannot describe how much the person in question is likely to kill the one they hate. Crimes commited under violent amounts of Animosity would be written off as crimes of passion, because Animosity is that strong.
Also the name of a legendary figure who took his opposition and used it create a powerful rage that propelled him to victory over all those who dared defy him.
DAMN! That guy has a lot of animosity, don't piss him off.
Why did you make Animosity mad? You know what he did to all those 'revolutionaries'.