sterile vs unproductive

sterile and unproductive both are adjectives.

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

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