Synonyms for punishment

correction, discipline, reproof, penalty, infliction, suffering, deprivation, unhappiness, trial, penance, retribution, deserts, just deserts, mortification, sequestration, disciplinary action, amercement, fine, mulct, reparation, forfeiture, forfeit, confiscation, dose of strap oil*, carrot-and-stick treatment*, bit of one's mind*, rap on the knuckles*; see also execution 2, sentence 1.

Antonyms freedom*, exoneration, release.