white sturgeon has 6 distinct synonyms spread across 2 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. 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.
valuable source of caviar and isinglass; found in Black and Caspian seas
food and game fish of marine and fresh waters of northwestern coast of North America
Synonyms, antonyms and the broader and narrower relations for white sturgeon come from Princeton University’s WordNet. Full sources and licences.