Antonyms for accept

allow into group:

turn away.

believe the goodness, realness of something:

hate, disapprove, disbelieve, dislike.

cognition:

reject.

possession:

refuse.

put up with:

contradict, dissent, stop, defend, fight.

receive by agreeing, consenting:

protest, condemn, oppose.

receive something given physically:

refuse, fail, discard, renounce, dispute, decline, repudiate, disagree, forfeit, misunderstand, disallow, blackball, deny, lose, demur, reject.

noun:

dislike, depreciate, challenge, discredit, condemn, surrender, deprecate, contend, discountenance, escape, oppose, disparage, withstand, mind, loathe, hate, dispute, dodge, contest, back off, abstain, denounce, suspect, miss, disfavor, resist, negative, reprobate, combat, dissent, forbear, mistrust, protest, frown, differ, back down, criticize, relinquish, doubt, give up, detest, hold off, question, abandon, forsake, censure, veto, fight, reprehend, Misdoubt, backtrack, distrust, blacklist, demur, object, unsay, detour, refrain.