shuttle has 3 distinct synonyms spread across 1 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.
badminton equipment consisting of a ball of cork or rubber with a crown of feathers
public transport that consists of a bus or train or airplane that flies back and forth between two points
Synonyms, antonyms and the broader and narrower relations for shuttle come from Princeton University’s WordNet. Full sources and licences.
bobbin that passes the weft thread between the warp threads
travel back and forth between two points