pony has 4 distinct synonyms spread across 2 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.
an informal term for a racehorse
“he liked to bet on the ponies”
Synonyms, antonyms and the broader and narrower relations for pony come from Princeton University’s WordNet. Full sources and licences.
a literal translation used in studying a foreign language (often used illicitly)
a small glass adequate to hold a single swallow of whiskey
any of various breeds of small gentle horses usually less than five feet high at the shoulder