shift, swing, compromise, switch, flip, adapt, alternate, alter, waver, oscillate, welsh, welch, deviate, vacillate, exchange, rethink, renege, amend, reverse, flip-flop, make a u-turn, flip (one's allegiance), reverse field, retract (an offer), switch around, toss aside, swap (positions), change (one's mind), vary (one's opinion), waffle, take turns, diverge, depart, stray, turn (away from), modify (one's stance), move between, break one's word/promise, make a one eighty

turn over, flip, invert, obviate, revoke, welsh, welch, nullify, invalidate, annul, tip over, upset, reject, turn around, capsize, overturn, turn upside down, turn on its head, flip-flop, veto, contradict, upend (order), revolutionize, repeal, disallow, overrule, make a u-turn, reverse (position/sequence/course), switch (positions), interchange, back out of (agreement), vacate

even out, stabilize, weigh, complement, proportion, match, nix, retract, nullify, void, invalidate, annul, withdraw, correct, offset, compensate, add, reverse, negate, wipe out/clean, cancel (out), counter, level (the playing field), equate, equal, balance (out), counterbalance, tip the balance, maintain (value), make up for, detract, temper with, outweigh, exact, neutralize, counterweigh, go against, counteract, remedy, make good, even out/up, counterpoise, countervail