magnificence vs grandeur

magnificence and grandeur both are nouns.

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

As nouns, magnificence and grandeur are synonyms defined as:

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

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

magnificence (noun)	grandeur (noun)
the quality of being magnificent or splendid or grand	the quality of being magnificent or splendid or grand
splendid or imposing in size or appearance	the quality of elevation of mind and exaltation of character or ideals or conduct