splendour vs grandness

splendour and grandness both are nouns.

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

As nouns, splendour and grandness are synonyms defined as:

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

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

splendour (noun)	grandness (noun)
a quality that outshines the usual	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
	splendid or imposing in size or appearance
	a prominent status