meaningless vs otiose

meaningless and otiose both are adjectives.

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

As adjectives, meaningless and otiose are synonyms defined as:

Other synonyms of meaningless include futile, ineffectual, unavailing.

meaningless (adjective)	otiose (adjective)
having no meaning or direction or purpose	disinclined to work or exertion
producing no result or effect	producing no result or effect
	serving no useful purpose; having no excuse for being