futile vs otiose

futile and otiose both are adjectives.

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

As adjectives, futile and otiose are synonyms defined as:

Other synonyms of futile include ineffectual, meaningless, unavailing.

futile (adjective)	otiose (adjective)
unproductive of success	disinclined to work or exertion
producing no result or effect	producing no result or effect
	serving no useful purpose; having no excuse for being