void vs vacancy

void and vacancy both are nouns.

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

As nouns, void and vacancy are synonyms defined as:

Other synonyms of void include emptiness, vacuum.

void (noun)	vacancy (noun)
an empty area or space	an empty area or space
the state of nonexistence	being unoccupied

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

void (verb)	vacancy (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