mindless vs vacuous

mindless and vacuous both are adjectives.

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

As adjectives, mindless and vacuous are synonyms defined as:

Other synonyms of mindless include vacant.

mindless (adjective)	vacuous (adjective)
not mindful or attentive	devoid of matter
devoid of intelligence or thought	devoid of intelligence or thought
lacking the thinking capacity characteristic of a conscious being	devoid of significance or force
requiring little mental effort
not marked by the use of reason