rerun has 1 distinct synonym spread across 1 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.
rerun a performance of a play, for example
run again for office
“Bush wants to rerun in 1996”
cause to perform again
“We have to rerun the subjects--they misunderstood the instructions”
a program that is broadcast again
“she likes to watch `I love Lucy' reruns”
Synonyms, antonyms and the broader and narrower relations for rerun come from Princeton University’s WordNet. Full sources and licences.