WordNet records no synonym and no antonym for pine-tar rag. 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.
baseball equipment consisting of a rag soaked with pine tar; used on the handle of a baseball bat to give a batter a firm grip
Synonyms, antonyms and the broader and narrower relations for pine-tar rag come from Princeton University’s WordNet. Full sources and licences.