strobe light has 2 distinct synonyms spread across 1 of its 1 sense. 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.
scientific instrument that provides a flashing light synchronized with the periodic movement of an object; can make moving object appear stationary
Synonyms, antonyms and the broader and narrower relations for strobe light come from Princeton University’s WordNet. Full sources and licences.