unimpregnated vs sterile

unimpregnated and sterile both are adjectives.

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

unimpregnated (adjective)	sterile (adjective)
not having been fertilized	incapable of reproducing
	free of or using methods to keep free of pathological microorganisms
	deficient in originality or creativity; lacking powers of invention