white lily has 8 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.
lily of eastern Mediterranean and the Balkans with broad funnel-shaped white flowers
white Egyptian lotus: water lily of Egypt to southeastern Africa; held sacred by the Egyptians
Synonyms, antonyms and the broader and narrower relations for white lily come from Princeton University’s WordNet. Full sources and licences.