WordNet records no synonym and no antonym for beguine. 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.
(Roman Catholic Church) a member of a lay sisterhood (one of several founded in the Netherlands in the 12th and 13th centuries); though not taking religious vows the sisters followed an austere life
music written in the bolero rhythm of the beguine dance
a ballroom dance that originated in the French West Indies; similar to the rumba
Synonyms, antonyms and the broader and narrower relations for beguine come from Princeton University’s WordNet. Full sources and licences.