void vs emptiness

void and emptiness both are nouns.

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

As nouns, void and emptiness are synonyms defined as:

Other synonyms of void include vacancy, vacuum.

void (noun)	emptiness (noun)
an empty area or space	the quality of being valueless or futile
the state of nonexistence	an empty area or space
	the state of containing nothing
	having an empty stomach

void (adjective)	emptiness (adjective)
containing nothing
lacking any legal or binding force

void (verb)	emptiness (verb)
excrete or discharge from the body
take away the legal force of or render ineffective
clear (a room, house, place) of occupants or empty or clear (a place or receptacle) of something
declare invalid