radish has 5 distinct synonyms spread across 3 of its 5 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.
pungent fleshy edible root
radish of Japan with a long hard durable root eaten raw or cooked
Synonyms, antonyms and the broader and narrower relations for radish come from Princeton University’s WordNet. Full sources and licences.
pungent edible root of any of various cultivated radish plants
Eurasian plant widely cultivated for its edible pungent root usually eaten raw
a cruciferous plant of the genus Raphanus having a pungent edible root