ruth has 7 distinct synonyms spread across 3 of its 4 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 professional baseball player famous for hitting home runs (1895-1948)
the great-grandmother of king David whose story is told in the Book of Ruth in the Old Testament
a feeling of sympathy and sorrow for the misfortunes of others
“the blind are too often objects of pity”
a book of the Old Testament that tells the story of Ruth who was not an Israelite but who married an Israelite and who stayed with her mother-in-law Naomi after her husband died
Synonyms, antonyms and the broader and narrower relations for ruth come from Princeton University’s WordNet. Full sources and licences.