token has 6 distinct synonyms spread across 3 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 individual instance of a type of symbol
“the word `error' contains three tokens of `r'”
something serving as a sign of something else
a metal or plastic disk that can be redeemed or used in designated slot machines
something of sentimental value
Synonyms, antonyms and the broader and narrower relations for token come from Princeton University’s WordNet. Full sources and licences.