renaissance man 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.
a modern scholar who is in a position to acquire more than superficial knowledge about many different interests
“a statistician has to be something of a generalist”
a scholar during the Renaissance who (because knowledge was limited) could know almost everything about many topics
Synonyms, antonyms and the broader and narrower relations for renaissance man come from Princeton University’s WordNet. Full sources and licences.