say it: suh-NAH-nuh-muhs
synonymous is an adjective meaning "(of words) meaning the same or nearly the same". It carries one recorded sense.
(of words) meaning the same or nearly the same
Definitions, synonyms and semantic relations for synonymous come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.