profusion vs richness

profusion and richness both are nouns.

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

As nouns, profusion and richness are synonyms defined as:

Other synonyms of profusion include cornucopia, profuseness.

profusion (noun)	richness (noun)
the property of being extremely abundant	a strong deep vividness of hue
	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