WordNet records no synonym and no antonym for punks. It is the only member of its synset, which is common for technical, taxonomic and single-sense vocabulary — there is no other English word that means the same thing. The broader and narrower terms below are the useful relations in that case.
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.
a youth subculture closely associated with punk rock music in the late 1970s; in part a reaction to the hippy subculture; dress was optional but intended to shock (plastic garbage bags or old school uniforms) and hair was dyed in bright colors (in Mohican haircuts or sometimes spiked in bright plumes)
Synonyms, antonyms and the broader and narrower relations for punks come from Princeton University’s WordNet. Full sources and licences.