WordNet records no synonym and no antonym for snake dance. 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.
a group advancing in a single-file serpentine path
a ceremonial dance (as by the Hopi) in which snakes are handled or invoked
Synonyms, antonyms and the broader and narrower relations for snake dance come from Princeton University’s WordNet. Full sources and licences.