synonymy Meaning, Definition & Usage

  1. noun the semantic relation that holds between two words that can (in a given context) express the same meaning
    synonymousness; synonymity.

WordNet

Syn*on"y*my noun
Etymology
L. synonymia, Gr. a synonym: cf. F. synonymie.
Definitions
  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.

Webster 1913