WordNet records no synonym and no antonym for civil rights movement. 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.
movement in the United States beginning in the 1960s and led primarily by Blacks in an effort to establish the civil rights of individual Black citizens
Synonyms, antonyms and the broader and narrower relations for civil rights movement come from Princeton University’s WordNet. Full sources and licences.