snapper has 6 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.
flesh of any of various important food fishes of warm seas
a party favor consisting of a paper roll (usually containing candy or a small favor) that pops when pulled at both ends
Australian food fish having a pinkish body with blue spots
any of several large sharp-toothed marine food and sport fishes of the family Lutjanidae of mainly tropical coastal waters
large-headed turtle with powerful hooked jaws found in or near water; prone to bite
Synonyms, antonyms and the broader and narrower relations for snapper come from Princeton University’s WordNet. Full sources and licences.