abate, abolish, abrogate, annul, avoid, cancel, disannul, dissolve, invalidate, negate, null, nullify, quash, repeal, rescind, roll back, vacate, void

countermand, override, overrule, overturn, vetoabort, call, call off, drop, recall, retract, reverse, revoke, suspend, withdrawban, enjoin, forbid, outlaw, prohibitdisallow, dismiss, rejectannihilate, break down, eliminate, eradicate, erase, liquidate, remove, throw out, write off

do away with, set aside

enact, lay down, legislateestablish, found, instituteformalize, legalize, legitimate, legitimize, validatepass, ratifyallow, approve, authorize, clear, endorse(also indorse), permit, sanction, warrantcommand, decree, mandate, order, prescribe