ferocity vs violence

ferocity and violence both are nouns.

Word	Noun	Adjective	Verb	Adverb
ferocity	Yes	No	No	No
violence	Yes	No	No	No

As nouns, ferocity and violence are synonyms defined as:

Other synonyms of ferocity include fierceness, furiousness, fury, vehemence, wildness.

ferocity (noun)	violence (noun)
the property of being wild or turbulent	an act of aggression (as one against a person who resists)
	the property of being wild or turbulent
	a turbulent state resulting in injuries and destruction etc.