WordNet records no synonym and no antonym for bootlegging. It is the only member of each of its synsets, 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.
the act of making or transporting alcoholic liquor for sale illegally
“the Prohibition amendment made bootlegging profitable”
the act of selling illegally or without permission
“the bootlegging of videotapes is common in Asia”
Synonyms, antonyms and the broader and narrower relations for bootlegging come from Princeton University’s WordNet. Full sources and licences.