WordNet records no synonym and no antonym for affirmative action. 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 policy designed to redress past discrimination against women and minority groups through measures to improve their economic and educational opportunities
“affirmative action has been extremely controversial and was challenged in 1978 in the Bakke decision”
Synonyms, antonyms and the broader and narrower relations for affirmative action come from Princeton University’s WordNet. Full sources and licences.