savagery vs violence

savagery and violence both are nouns.

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

As nouns, violence is a hypernym of savagery; that is, violence is a word with a broader meaning than savagery:

Other hypernyms of savagery include ferocity, fierceness, furiousness, fury, vehemence, wildness.

savagery (noun)	violence (noun)
a brutal barbarous savage act	an act of aggression (as one against a person who resists)
the trait of extreme cruelty	the property of being wild or turbulent
the property of being untamed and ferocious	a turbulent state resulting in injuries and destruction etc.