meaningless vs vacuous

meaningless and vacuous both are adjectives.

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

meaningless (adjective)	vacuous (adjective)
having no meaning or direction or purpose	devoid of matter
producing no result or effect	devoid of intelligence or thought
	devoid of significance or force