synonymy

noun

1. 1

   The quality of being synonymous; sameness of meaning.

2. 2

   A list or collection of synonyms, often compared and contrasted.

3. 3

   The study of synonyms.

4. 4

   A system of synonyms.

5. 5

   The collective synonyms (all the names referring to a particular taxon, except the correct name)

6. 6

   The state of not being a correct name, of being a synonym

   “In 1924 this name was reduced to synonymy.”

7. 7

   The collective synonyms (all the names referring to the same taxon, including the correct name)