Antonyms for praise

congratulations; adoration:

castigation, censure, condemnation, disregard, denunciation, disrespect, criticism, silence, blame, disapproval, neglect.

communication:

criticize.

congratulate; adore:

condemn, humiliate, disgrace, belittle, oppose, protest, demote, hide, conceal, dishonor, depress, shame, veto, damn, prevent, decrease, degrade, denounce, disapprove, accuse, criticize, discourage, castigate, overlook, lower, reproach, debase, disallow, disparage, insult, refuse.

noun:

disapprobation, skewer, excoriate, abuse, hissing, slam, Discommend, repudiation, reproof, contempt, pan, vituperation, ignominy, obloquy, knock, scorn.