thomas has 11 distinct synonyms spread across 5 of its 5 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.
United States clockmaker who introduced mass production (1785-1859)
United States socialist who was a candidate for president six times (1884-1968)
a radio broadcast journalist during World War I and World War II noted for his nightly new broadcast (1892-1981)
the Apostle who would not believe the resurrection of Jesus until he saw Jesus with his own eyes
Synonyms, antonyms and the broader and narrower relations for thomas come from Princeton University’s WordNet. Full sources and licences.