annul Synonyms

revoke rescind repeal reverse nullify vacate lift cancel destroy avoid overturn countermand void abrogate quash invalidate stop superseding terminate unbuild undo unmake unmarry stet spoliate ruinate prorogate quashing recall recant remove call off rescinding rescission retract reversing veto break even counter check vandalise stamp out pull the plug plagiarise cancel out strikeout unclip unwire watergate declare null and void neutralise