THESAURUS
abnegation, contradiction, declension, declination, declinature, declining, denial, deprivation, disagreement, disallowance, disclaimer, disclamation, disobedience, dissent, holding back, nay, negation, negative, negative answer, nix, no, nonacceptance, noncompliance, nonconsent, nonobservance, recantation, refusal, rejection, repudiation, retention, thumbs-down, unwillingness, withholding