barbarity vs atrociousness

barbarity and atrociousness both are nouns.

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

As nouns, barbarity and atrociousness are synonyms defined as:

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

Other synonyms of barbarity include atrocity, barbarousness, heinousness.

barbarity (noun)	atrociousness (noun)
a brutal barbarous savage act	the quality of being shockingly cruel and inhumane
the quality of being shockingly cruel and inhumane