retire has 19 distinct synonyms spread across 7 of its 11 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.
go into retirement; stop performing one's work or withdraw from one's position
“He retired at age 68”
withdraw from active participation
“He retired from chess”
withdraw from circulation or from the market, as of bills, shares, and bonds
make (someone) retire
“The director was retired after the scandal”
dispose of (something no longer useful or needed)
“She finally retired that old coat”
lose interest
“he retired from life when his wife died”
Synonyms, antonyms and the broader and narrower relations for retire come from Princeton University’s WordNet. Full sources and licences.