large-hearted has 6 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.
showing or motivated by sympathy and understanding and generosity
“was charitable in his opinions of others”
Synonyms, antonyms and the broader and narrower relations for large-hearted come from Princeton University’s WordNet. Full sources and licences.