richness vs magnificence

richness and magnificence both are nouns.

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

As nouns, richness and magnificence are synonyms defined as:

Other synonyms of richness include grandness, impressiveness.

richness (noun)	magnificence (noun)
a strong deep vividness of hue	the quality of being magnificent or splendid or grand
the property of a sensation that is rich and pleasing	splendid or imposing in size or appearance
the property of producing abundantly and sustaining vigorous and luxuriant growth
the property of being extremely abundant
splendid or imposing in size or appearance
the quality of having high intrinsic value
abundant wealth