fruitless vs futile

fruitless and futile both are adjectives.

Word	Noun	Adjective	Verb	Adverb
fruitless	No	Yes	No	No
futile	No	Yes	No	No

As adjectives, fruitless and futile are synonyms defined as:

Other synonyms of fruitless include bootless, sleeveless, vain.

fruitless (adjective)	futile (adjective)
unproductive of success	unproductive of success
	producing no result or effect