grandness vs grandeur

grandness and grandeur both are nouns.

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

As nouns, grandness and grandeur are synonyms defined as:

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

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

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