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”
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
Synonyms, antonyms and the broader and narrower relations for pony come from Princeton University’s WordNet. Full sources and licences.