savagery vs cruelty

savagery and cruelty both are nouns.

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

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

Other hypernyms of savagery include cruelness, harshness.

savagery (noun)	cruelty (noun)
a brutal barbarous savage act	a cruel act; a deliberate infliction of pain and suffering
the trait of extreme cruelty	the quality of being cruel and causing tension or annoyance
the property of being untamed and ferocious	feelings of extreme heartlessness