vacuity vs mindlessness

vacuity and mindlessness both are nouns.

Word	Noun	Adjective	Verb	Adverb
vacuity	Yes	No	No	No
mindlessness	Yes	No	No	No

As nouns, vacuity and mindlessness are synonyms defined as:

Other synonyms of vacuity include inanity, pointlessness, senselessness.

vacuity (noun)	mindlessness (noun)
total lack of meaning or ideas	the trait of acting rashly and without prudence
a region that is devoid of matter	total lack of meaning or ideas
the absence of matter