grandness vs excellence

grandness and excellence both are nouns.

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

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

grandness: splendid or imposing in size or appearance
excellence: the quality of excelling; possessing good qualities in high degree

grandness (noun)	excellence (noun)
the quality of being magnificent or splendid or grand	the quality of excelling; possessing good qualities in high degree
unusual largeness in size or extent or number	an outstanding feature; something in which something or someone excels
splendid or imposing in size or appearance
a prominent status