Synonymy

Synonymy, in linguistics, can refer to:

• Synonym (Semantic), relationship of identity or similarity of meanings between certain words or prayers.
• Structural Homonimia or structural synonym; in linguistic structuralism, a syntactic phenomenon in which there is ambiguity in the interpretation of a given sentence.

Also, in biology, can refer to:

• Synonym (biology), existence of more than one scientific name for the same taxon.