gdp has 1 distinct synonym spread across 1 of its 1 sense. Each sense below keeps its own list, because a synonym belongs to a meaning and not to a word: swapping one sense's substitute into another sense's sentence is how a thesaurus makes writing worse. WordNet records no antonym for it — antonymy is a relation between word forms rather than concepts, so it is deliberately sparse.
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.
the measure of an economy adopted by the United States in 1991; the total market values of goods and services produced by workers and capital within a nation's borders during a given period (usually 1 year)
Synonyms, antonyms and the broader and narrower relations for gdp come from Princeton University’s WordNet. Full sources and licences.