greenness vs richness

greenness and richness both are nouns.

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

As nouns, richness is a hypernym of greenness; that is, richness is a word with a broader meaning than greenness:

Other hypernyms of greenness include cornucopia, profuseness, profusion.

greenness (noun)	richness (noun)
green color or pigment; resembling the color of growing grass	a strong deep vividness of hue
the lush appearance of flourishing vegetation	the property of a sensation that is rich and pleasing
the state of not being ripe	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