george has 8 distinct synonyms spread across 7 of its 7 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.
Christian martyr; patron saint of England; hero of the legend of Saint George and the Dragon in which he slew a dragon and saved a princess (?-303)
King of Great Britain and Ireland and emperor of India from 1936 to 1947; he succeeded Edward VIII (1895-1952)
King of Great Britain and Ireland and emperor of India from 1910 to 1936; gave up his German title in 1917 during World War I (1865-1936)
King of Great Britain and Ireland and Hanover from 1820 to 1830; his attempt to divorce his estranged wife undermined the prestige of the Crown (1762-1830)
King of Great Britain and Ireland from 1760 to 1820; the American colonies were lost during his reign; he became insane in 1811 and his son (later George IV) acted as regent until 1820 (1738-1820)
King of Great Britain and Elector of Hanover from 1727 to 1760 (1683-1760)
Elector of Hanover and the first Hanoverian King of Great Britain and Ireland from 1714 to 1727 (1660-1727)
Synonyms, antonyms and the broader and narrower relations for george come from Princeton University’s WordNet. Full sources and licences.