vacuity vs inanity

vacuity and inanity both are nouns.

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

As nouns, vacuity and inanity are synonyms defined as:

Other synonyms of vacuity include mindlessness, pointlessness, senselessness.

vacuity (noun)	inanity (noun)
total lack of meaning or ideas	total lack of meaning or ideas
a region that is devoid of matter
the absence of matter