barbarity vs atrocity

barbarity and atrocity both are nouns.

Word	Noun	Adjective	Verb	Adverb
barbarity	Yes	No	No	No
atrocity	Yes	No	No	No

As nouns, atrocity is a hypernym of barbarity; that is, atrocity is a word with a broader meaning than barbarity:

Other hypernyms of barbarity include inhumanity.

As nouns, barbarity and atrocity are synonyms defined as:

barbarity and atrocity: the quality of being shockingly cruel and inhumane

Other synonyms of barbarity include atrociousness, barbarousness, heinousness.

barbarity (noun)	atrocity (noun)
a brutal barbarous savage act	an act of atrocious cruelty
the quality of being shockingly cruel and inhumane	the quality of being shockingly cruel and inhumane