revoke, go back on, renege on, renegue on, renegue, reneg, reneague, renague, retract, renig, more...

honor, keep, uphold

welch, default, go back on a deal, more...

break a promise,   break promise,   go back on word,   to go back on,   weasel out of,   to break a promise,   break one's promise,   go back on a deal,   break your promise,   not keep word