productivity vs fecundity

productivity and fecundity both are nouns.

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

As nouns, fecundity is a hypernym of productivity; that is, fecundity is a word with a broader meaning than productivity:

productivity: the quality of being productive or having the power to produce
fecundity: the quality of something that causes or assists healthy growth

Other hypernyms of productivity include fruitfulness.

productivity (noun)	fecundity (noun)
the quality of being productive or having the power to produce	the quality of something that causes or assists healthy growth
(economics) the ratio of the quantity and quality of units produced to the labor per unit of time	the intellectual productivity of a creative imagination
	the state of being fertile; capable of producing offspring