acrogenous vs acrogen

acrogenous is not a noun while acrogen is a noun.

Word	Noun	Adjective	Verb	Adverb
acrogenous	No	Yes	No	No
acrogen	Yes	No	No	No

acrogenous (noun)	acrogen (noun)
	any flowerless plant such as a fern (pteridophyte) or moss (bryophyte) in which growth occurs only at the tip of the main stem

acrogenous (adjective)	acrogen (adjective)
pertaining to flowerless plants (ferns or mosses) in which growth occurs only at the tip of the main stem