disapproval has 3 distinct synonyms spread across 1 of its 4 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 approval.
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.
an inclination to withhold approval from some person or group
Synonyms, antonyms and the broader and narrower relations for disapproval come from Princeton University’s WordNet. Full sources and licences.