profusion vs greenness

profusion and greenness both are nouns.

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

As nouns, greenness is a hyponym of profusion; that is, greenness is a word with a more specific, narrower meaning than profusion:

Other hyponyms of profusion include overgrowth, verdancy, verdure, wilderness.

profusion (noun)	greenness (noun)
the property of being extremely abundant	green color or pigment; resembling the color of growing grass
	the lush appearance of flourishing vegetation
	the state of not being ripe