vacuum vs emptiness

vacuum and emptiness both are nouns.

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

As nouns, vacuum and emptiness are synonyms defined as:

Other synonyms of vacuum include vacancy, void.

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

vacuum (noun)	emptiness (noun)
an electrical home appliance that cleans by suction	the quality of being valueless or futile
a region that is devoid of matter	an empty area or space
an empty area or space	the state of containing nothing
the absence of matter	having an empty stomach

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