quark has 1 distinct synonym spread across 1 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.
(physics) hypothetical truly fundamental particle in mesons and baryons; there are supposed to be six flavors of quarks (and their antiquarks), which come in pairs; each has an electric charge of +2/3 or -1/3
“quarks have not been observed directly but theoretical predictions based on their existence have been confirmed experimentally”
fresh unripened cheese of a smooth texture made from pasteurized milk, a starter, and rennet
Synonyms, antonyms and the broader and narrower relations for quark come from Princeton University’s WordNet. Full sources and licences.