WordNet records no synonym and no antonym for marie antoinette. 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.
queen of France (as wife of Louis XVI) who was unpopular; her extravagance and opposition to reform contributed to the overthrow of the monarchy; she was guillotined along with her husband (1755-1793)
Synonyms, antonyms and the broader and narrower relations for marie antoinette come from Princeton University’s WordNet. Full sources and licences.