synonymy

[si-non-uh-mee] /sɪˈnɒn ə mi/
noun, plural synonymies for 3, 4.
1.
the quality of being synonymous; equivalence in meaning.
2.
the study of synonyms.
3.
a set, list, or system of synonyms.
4.
Biology. a list of the scientific names, with explanatory matter and location of type or types, for a particular taxonomic group.
Origin
1600-10; < Late Latin synōnymia < Greek synōnymía. See synonymous, -y3
Examples from the web for synonymy
  • synonymy, redundancy, and the name of the crocodile stem-group.
  • The synonymy of this taxon is complex, and correct use of some scientific names is currently uncertain.
  • The objection to synonymy hinges upon the problem of collateral information.
British Dictionary definitions for synonymy

synonymy

/sɪˈnɒnɪmɪ/
noun (pl) -mies
1.
the study of synonyms
2.
the character of being synonymous; equivalence
3.
a list or collection of synonyms, esp one in which their meanings are discriminated
4.
(biology) a collection of the synonyms of a species or group