grandness vs enormity

grandness and enormity both are nouns.

Word	Noun	Adjective	Verb	Adverb
grandness	Yes	No	No	No
enormity	Yes	No	No	No

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

grandness (noun)	enormity (noun)
the quality of being magnificent or splendid or grand	an act of extreme wickedness
unusual largeness in size or extent or number	the quality of extreme wickedness
splendid or imposing in size or appearance	the quality of being outrageous
a prominent status	vastness of size or extent