sterile vs unimpregnated

sterile and unimpregnated both are adjectives.

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

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