richness vs affluence

richness and affluence both are nouns.

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

As nouns, richness and affluence are synonyms defined as:

richness (noun)	affluence (noun)
a strong deep vividness of hue	abundant wealth
the property of a sensation that is rich and pleasing
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