同义词的英文是：synonym。
synonym是一个英语单词，名词，作名词时意思是“同义词；同义字”。单词发音是：英[ˈsɪnənɪm]；美[ˈsɪnənɪm]。短语搭配：local synonym或本地近义字；或当地近义字；远义字。senior synonym先定同物异名；生物、首异名；本种同物异名；首同物异名。
双语例句
1、“工业民主”这个词常被用作“工人参与”的同义词。The term 'industrial democracy' is often used as a synonym for worker participation.
2、工业民主这个词常被用作“工人参与”的同义词。The term 'industrial democracy' is often used as a synonym for worker participation.
3、我听说他很爱指使人的。同义词“push around”；B: I heard that he love to boss people around.
4、人们常常将SOA与Web服务混为一谈，但是这两者不是同义词。SOAs are often confused with Web services, but the two are not synonymous.
5、为了方便本文的讲解，一个Integration Developer应用程序就是一个Process Server应用程序的同义词。For the purposes of this article, an Integration Developer application is synonymous with a Process Server application.