greatness vs grandness

greatness and grandness both are nouns.

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

As nouns, greatness and grandness are synonyms defined as:

Other synonyms of greatness include enormousness, immenseness, immensity, sizeableness, vastness, wideness.

greatness (noun)	grandness (noun)
the property possessed by something or someone of outstanding importance or eminence	the quality of being magnificent or splendid or grand
unusual largeness in size or extent or number	unusual largeness in size or extent or number
	splendid or imposing in size or appearance
	a prominent status