adhering (to), clinging (to), hewing (to), keeping (to), standing by, sticking (to or with)

cleaving (to)advocating, backing, championing, confirming, defending, endorsing(also indorsing), espousing, supporting, upholdingaccepting, adopting, cherishing, cultivating, embracing, following, fostering, heedingbackstopping, bolstering, boosting, buttressing, enforcing, reinforcing(also reenforcing)

abiding by, living up to

defecting (from)

abandoning, abnegating, deserting, forsaking, giving up, relinquishing, spurning, surrenderingabjuring, recalling, recanting, reconsidering, reneging, renouncing, retracting, revoking, taking back, unsaying, withdrawingcontroverting, disagreeing (with), disproving, disputing, rebutting, refutingcontradicting, denying, disavowing, disclaiming, disowning, gainsaying, negating, negativing, repudiatingbacking down, backing off, backtracking