savagery vs ferocity

savagery and ferocity both are nouns.

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

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

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

savagery (noun)	ferocity (noun)
a brutal barbarous savage act	the property of being wild or turbulent
the trait of extreme cruelty
the property of being untamed and ferocious