splendour vs brilliance

splendour and brilliance both are nouns.

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

As nouns, splendour and brilliance are synonyms defined as:

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

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

splendour (noun)	brilliance (noun)
a quality that outshines the usual	a light within the field of vision that is brighter than the brightness to which the eyes are adapted
the quality of being magnificent or splendid or grand	the quality of being magnificent or splendid or grand
	unusual mental ability