harshness vs savagery

harshness and savagery both are nouns.

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

As nouns, savagery is a hyponym of harshness; that is, savagery is a word with a more specific, narrower meaning than harshness:

Other hyponyms of harshness include brutality, ferociousness, viciousness, murderousness.

harshness (noun)	savagery (noun)
the quality of being harsh or rough or grating to the senses	a brutal barbarous savage act
excessive sternness	the trait of extreme cruelty
the roughness of a substance that causes abrasions	the property of being untamed and ferocious
the quality of being cruel and causing tension or annoyance