yellow henbane 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.
found on sea beaches from Virginia to South America having greenish-yellow flowers and orange or yellow berries
Synonyms, antonyms and the broader and narrower relations for yellow henbane come from Princeton University’s WordNet. Full sources and licences.