loftiness vs grandness

loftiness and grandness both are nouns.

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

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

Other hypernyms of loftiness include impressiveness, magnificence, richness.

loftiness (noun)	grandness (noun)
the quality of being high or lofty	the quality of being magnificent or splendid or grand
impressiveness in scale or proportion	unusual largeness in size or extent or number
	splendid or imposing in size or appearance
	a prominent status