typesetter's case has 2 distinct synonyms spread across 1 of its 1 sense. 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.
(printing) the receptacle in which a compositor has his type, which is divided into compartments for the different letters, spaces, or numbers
“for English, a compositor will ordinarily have two such cases, the upper case containing the capitals and the lower case containing the small letters”
Synonyms, antonyms and the broader and narrower relations for typesetter's case come from Princeton University’s WordNet. Full sources and licences.