Same word as knockback:
abnegation, ban, choice, cold shoulder, declension, declination, defiance, disallowance, disapproval, disavowal, disclaimer, discountenancing, disfavor, dissent, enjoinment, exclusion, forbidding, interdiction, knockback, negation, nix, no, nonacceptance, noncomp
abnegation, ban, choice, cold shoulder, declension, declination, defiance, disallowance, disapproval, disavowal, disclaimer, discountenancing, disfavor, dissent, enjoinment, exclusion, forbidding, interdiction, knockback, negation, nix, no, nonacceptance, noncomp