lamella has 1 distinct synonym spread across 1 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.
any of the radiating leaflike spore-producing structures on the underside of the cap of a mushroom or similar fungus
a thin membrane that is one of the calcified layers that form bones
Synonyms, antonyms and the broader and narrower relations for lamella come from Princeton University’s WordNet. Full sources and licences.