punk has 20 distinct synonyms spread across 5 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.
substance that smolders when ignited; used to light fuses (especially fireworks)
a teenager or young adult who is a performer (or enthusiast) of punk rock and a member of the punk youth subculture
rock music with deliberately offensive lyrics expressing anger and social alienation; in part a reaction against progressive rock
Synonyms, antonyms and the broader and narrower relations for punk come from Princeton University’s WordNet. Full sources and licences.