fertile vs fecundity

fertile is not a noun while fecundity is a noun.

Word	Noun	Adjective	Verb	Adverb
fertile	No	Yes	No	No
fecundity	Yes	No	No	No

fertile (noun)	fecundity (noun)
	the quality of something that causes or assists healthy growth
	the intellectual productivity of a creative imagination
	the state of being fertile; capable of producing offspring

fertile (adjective)	fecundity (adjective)
capable of reproducing
marked by great fruitfulness
bearing in abundance especially offspring
intellectually productive