vacuum vs vacuity

vacuum and vacuity both are nouns.

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

As nouns, vacuum and vacuity are synonyms defined as:

As nouns, vacuum and vacuity are synonyms defined as:

vacuum (noun)	vacuity (noun)
an electrical home appliance that cleans by suction	total lack of meaning or ideas
a region that is devoid of matter	a region that is devoid of matter
an empty area or space	the absence of matter
the absence of matter

vacuum (verb)	vacuity (verb)
clean with a vacuum cleaner