guglielmo marconi has 1 distinct synonym 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.
Italian electrical engineer who invented wireless telegraphy and in 1901 transmitted radio signals across the Atlantic Ocean (1874-1937)
Synonyms, antonyms and the broader and narrower relations for guglielmo marconi come from Princeton University’s WordNet. Full sources and licences.