corruption has 9 distinct synonyms spread across 4 of its 6 senses. Each sense below keeps its own list, because a synonym belongs to a meaning and not to a word: swapping one sense's substitute into another sense's sentence is how a thesaurus makes writing worse. WordNet records no antonym for it — antonymy is a relation between word forms rather than concepts, so it is deliberately sparse.
Counts are distinct word forms across every sense. A synonym that appears under three senses is counted once here and shown three times below, under each sense it belongs to.
lack of integrity or honesty (especially susceptibility to bribery); use of a position of trust for dishonest gain
in a state of progressive putrefaction
decay of matter (as by rot or oxidation)
moral perversion; impairment of virtue and moral principles
“the luxury and corruption among the upper classes”
destroying someone's (or some group's) honesty or loyalty; undermining moral integrity
“corruption of a minor”
inducement (as of a public official) by improper means (as bribery) to violate duty (as by commiting a felony)
“he was held on charges of corruption and racketeering”
Synonyms, antonyms and the broader and narrower relations for corruption come from Princeton University’s WordNet. Full sources and licences.