nullify vs void

nullify is not a noun while void is a noun.

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

As verbs, nullify and void are synonyms defined as:

Other synonyms of nullify include annul, avoid, invalidate, quash.

nullify (noun)	void (noun)
	an empty area or space
	the state of nonexistence

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

nullify (verb)	void (verb)
make ineffective by counterbalancing the effect of	excrete or discharge from the body
show to be invalid	take away the legal force of or render ineffective
declare invalid	clear (a room, house, place) of occupants or empty or clear (a place or receptacle) of something
	declare invalid