vacuity vs emptiness

vacuity and emptiness both are nouns.

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

As nouns, emptiness is a hypernym of vacuity; that is, emptiness is a word with a broader meaning than vacuity:

vacuity (noun)	emptiness (noun)
total lack of meaning or ideas	the quality of being valueless or futile
a region that is devoid of matter	an empty area or space
the absence of matter	the state of containing nothing
	having an empty stomach