Nouns

(n)nothingness, void, nullity, nihilitythe state of nonexistence
(n)void, vacancy, emptiness, vacuuman empty area or space“the huge desert voids”, “the emptiness of outer space”, “without their support he'll be ruling in a vacuum”

Verbs

(v)invalidate, annul, quash, void, avoid, nullifydeclare invalid“The contract was annulled”, “void a plea”
(v)voidclear (a room, house, place) of occupants or empty or clear (a place or receptacle) of something“The chemist voided the glass bottle”, “The concert hall was voided of the audience”
(v)invalidate, void, vitiatetake away the legal force of or render ineffective“invalidate a contract”
(v)evacuate, void, emptyexcrete or discharge from the body

Adjectives

(s)null, voidlacking any legal or binding force“null and void”
(s)voidcontaining nothing“the earth was without form, and void”