bridge has 6 distinct synonyms spread across 6 of its 12 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.
a structure that allows people or vehicles to cross an obstacle such as a river or canal or railway etc.
a circuit consisting of two branches (4 arms arranged in a diamond configuration) across which a meter is connected
something resembling a bridge in form or function
“his letters provided a bridge across the centuries”
the hard ridge that forms the upper part of the nose
“her glasses left marks on the bridge of her nose”
any of various card games based on whist for four players
a wooden support that holds the strings up
an upper deck where a ship is steered and the captain stands
Synonyms, antonyms and the broader and narrower relations for bridge come from Princeton University’s WordNet. Full sources and licences.