beefsteak plant has 4 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.
plant grown for its ornamental red or purple foliage
South American plant having green to purple or red branches with green to purple ornamental foliage and spikes of insignificant woolly flowers with dry membranous bracts
Synonyms, antonyms and the broader and narrower relations for beefsteak plant come from Princeton University’s WordNet. Full sources and licences.