mimosa has 3 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.
evergreen Australasian tree having white or silvery bark and young leaves and yellow flowers
any of various tropical shrubs or trees of the genus Mimosa having usually yellow flowers and compound leaves
Synonyms, antonyms and the broader and narrower relations for mimosa come from Princeton University’s WordNet. Full sources and licences.