splendour vs magnificence

splendour and magnificence both are nouns.

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

As nouns, splendour and magnificence are synonyms defined as:

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

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

splendour (noun)	magnificence (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	splendid or imposing in size or appearance