incorrupt has 1 distinct synonym spread across 1 of its 2 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. Its one recorded opposite is corrupt.
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.
free of corruption or immorality
“a policeman who was incorrupt and incorruptible”
not decayed
Synonyms, antonyms and the broader and narrower relations for incorrupt come from Princeton University’s WordNet. Full sources and licences.