generous has no recorded synonym. 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. Its 2 recorded opposites are stingy, ungenerous.
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.
willing to give and share unstintingly
“a generous donation”
not petty in character and mind
“unusually generous in his judgment of people”
1 of the 3 recorded senses carries no synonym, antonym or related term, so it is not shown above. Every sense, with its definition and examples, is on the full entry for generous.
Synonyms, antonyms and the broader and narrower relations for generous come from Princeton University’s WordNet. Full sources and licences.