luster vs splendour

luster and splendour both are nouns.

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

As nouns, luster and splendour are synonyms defined as:

Other synonyms of luster include brilliancy, lustre, splendor.

luster (noun)	splendour (noun)
a surface coating for ceramics or porcelain	a quality that outshines the usual
a quality that outshines the usual	the quality of being magnificent or splendid or grand
the visual property of something that shines with reflected light