grandeur vs grandness

grandeur and grandness both are nouns.

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

As nouns, grandeur and grandness are synonyms defined as:

grandeur and grandness: the quality of being magnificent or splendid or grand

Other synonyms of grandeur include brilliance, magnificence, splendor, splendour.

grandeur (noun)	grandness (noun)
the quality of being magnificent or splendid or grand	the quality of being magnificent or splendid or grand
the quality of elevation of mind and exaltation of character or ideals or conduct	unusual largeness in size or extent or number
	splendid or imposing in size or appearance
	a prominent status