toggle has 3 distinct synonyms spread across 1 of its 6 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.
any instruction that works first one way and then the other; it turns something on the first time it is used and then turns it off the next time
a hinged switch that can assume either of two positions
Synonyms, antonyms and the broader and narrower relations for toggle come from Princeton University’s WordNet. Full sources and licences.
a fastener consisting of a peg or pin or crosspiece that is inserted into an eye at the end of a rope or a chain or a cable in order to fasten it to something (as another rope or chain or cable)
release by a toggle switch
“toggle a bomb from an airplane”