unfruitful vs stillborn

unfruitful and stillborn both are adjectives.

Word	Noun	Adjective	Verb	Adverb
unfruitful	No	Yes	No	No
stillborn	No	Yes	No	No

unfruitful (adjective)	stillborn (adjective)
not fruitful; not conducive to abundant production	(of newborn infant) showing no signs of life at birth; not liveborn
	failing to accomplish an intended result