lear has 2 distinct synonyms spread across 2 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.
British artist and writer of nonsense verse (1812-1888)
the hero of William Shakespeare's tragedy who was betrayed and mistreated by two of his scheming daughters
Synonyms, antonyms and the broader and narrower relations for lear come from Princeton University’s WordNet. Full sources and licences.