sizeableness vs grandness

sizeableness and grandness both are nouns.

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

As nouns, sizeableness and grandness are synonyms defined as:

sizeableness and grandness: unusual largeness in size or extent or number

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

sizeableness (noun)	grandness (noun)
unusual largeness in size or extent or number	the quality of being magnificent or splendid or grand
	unusual largeness in size or extent or number
	splendid or imposing in size or appearance
	a prominent status