bass has 6 distinct synonyms spread across 6 of its 9 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.
Synonyms, antonyms and the broader and narrower relations for bass come from Princeton University’s WordNet. Full sources and licences.
the lean flesh of a saltwater fish of the family Serranidae
any of various North American freshwater fish with lean flesh (especially of the genus Micropterus)
the lowest adult male singing voice
the member with the lowest range of a family of musical instruments
nontechnical name for any of numerous edible marine and freshwater spiny-finned fishes