grandness vs elegance

grandness and elegance both are nouns.

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

As nouns, elegance is a hypernym of grandness; that is, elegance is a word with a broader meaning than grandness:

grandness (noun)	elegance (noun)
the quality of being magnificent or splendid or grand	a refined quality of gracefulness and good taste
unusual largeness in size or extent or number	a quality of neatness and ingenious simplicity in the solution of a problem (especially in science or mathematics)
splendid or imposing in size or appearance
a prominent status