unproductive vs sterile

unproductive and sterile both are adjectives.

Word	Noun	Adjective	Verb	Adverb
unproductive	No	Yes	No	No
sterile	No	Yes	No	No

unproductive (adjective)	sterile (adjective)
not producing or capable of producing	incapable of reproducing
not producing desired results	free of or using methods to keep free of pathological microorganisms
	deficient in originality or creativity; lacking powers of invention