bell has 14 distinct synonyms spread across 8 of its 11 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 hollow device made of metal that makes a ringing sound when struck
a push button at an outer door that gives a ringing or buzzing signal when pushed
the sound of a bell being struck
“saved by the bell”
(nautical) each of the eight half-hour units of nautical time signaled by strokes of a ship's bell; eight bells signals 4:00, 8:00, or 12:00 o'clock, either a.m. or p.m.
a phonetician and father of Alexander Graham Bell (1819-1905)
English painter; sister of Virginia Woolf; prominent member of the Bloomsbury Group (1879-1961)
United States inventor (born in Scotland) of the telephone (1847-1922)
a percussion instrument consisting of a set of tuned bells that are struck with a hammer; used as an orchestral instrument
the flared opening of a tubular device
Synonyms, antonyms and the broader and narrower relations for bell come from Princeton University’s WordNet. Full sources and licences.