band has 11 distinct synonyms spread across 8 of its 15 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.
an unofficial association of people or groups
“the smart set goes there”
instrumentalists not including string players
a group of musicians playing popular music for dancing
a range of frequencies between two limits
jewelry consisting of a circlet of precious metal (often set with jewels) worn on the finger
“she had rings on every finger”
a restraint put around something to hold it together
Synonyms, antonyms and the broader and narrower relations for band come from Princeton University’s WordNet. Full sources and licences.