productive vs fertile

productive and fertile both are adjectives.

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

As adjectives, productive and fertile are synonyms defined as:

Other synonyms of productive include fat, rich.

productive (adjective)	fertile (adjective)
producing or capable of producing (especially abundantly)	capable of reproducing
having the ability to produce or originate	marked by great fruitfulness
marked by great fruitfulness	bearing in abundance especially offspring
yielding positive results	intellectually productive