grandness vs greatness

grandness and greatness both are nouns.

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

As nouns, grandness and greatness are synonyms defined as:

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

grandness (noun)	greatness (noun)
the quality of being magnificent or splendid or grand	the property possessed by something or someone of outstanding importance or eminence
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