heinousness vs atrocity

heinousness and atrocity both are nouns.

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

As nouns, heinousness and atrocity are synonyms defined as:

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

Other synonyms of heinousness include atrociousness, barbarity, barbarousness.

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