repertory has 3 distinct synonyms spread across 3 of its 4 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.
a storehouse where a stock of things is kept
the entire range of skills or aptitudes or devices used in a particular field or occupation
“the repertory of the supposed feats of mesmerism”
Synonyms, antonyms and the broader and narrower relations for repertory come from Princeton University’s WordNet. Full sources and licences.
a collection of works (plays, songs, operas, ballets) that an artist or company can perform and do perform for short intervals on a regular schedule
a theatrical company that performs plays from a repertoire