WordNet records no synonym and no antonym for democratic-republican party. 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.
a former major political party in the United States in the early 19th century; opposed the old Federalist party; favored a strict interpretation of the constitution in order to limit the powers of the federal government
Synonyms, antonyms and the broader and narrower relations for democratic-republican party come from Princeton University’s WordNet. Full sources and licences.