squill has 4 distinct synonyms spread across 2 of its 3 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.
bulb of the sea squill, which is sliced, dried, and used as an expectorant
having dense spikes of small white flowers and yielding a bulb with medicinal properties
Synonyms, antonyms and the broader and narrower relations for squill come from Princeton University’s WordNet. Full sources and licences.
an Old World plant of the genus Scilla having narrow basal leaves and pink or blue or white racemose flowers