adhering (to), clinging (to), hewing (to), keeping (to), 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, holding to, 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