purple ground cherry has 6 distinct synonyms spread across 2 of its 2 senses. 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.
Mexican annual naturalized in eastern North America having yellow to purple edible fruit resembling small tomatoes
annual of tropical South America having edible purple fruits
Synonyms, antonyms and the broader and narrower relations for purple ground cherry come from Princeton University’s WordNet. Full sources and licences.