n. 类义,类义字研究,类义字重覆

[ noun ]
the semantic relation that holds between two words that can (in a given context) express the same meaning
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Synonymy \Syn*on"y*my\, n. [L. synonymia, Gr. ? a synonym: cf.
F. synonymie.]
1. The quality of being synonymous; sameness of meaning.

2. A system of synonyms.

3. (Rhet.) A figure by which synonymous words are used to
amplify a discourse.