barbarousness vs atrocity

barbarousness and atrocity both are nouns.

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

As nouns, barbarousness and atrocity are synonyms defined as:

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

Other synonyms of barbarousness include atrociousness, barbarity, heinousness.

barbarousness (noun)	atrocity (noun)
the quality of being shockingly cruel and inhumane	an act of atrocious cruelty
	the quality of being shockingly cruel and inhumane