syn·​on·​y·​my | \sə-ˈnä-nə-mē \
plural synonymies

Definition of synonymy 

1a : a list or collection of synonyms often defined and discriminated from each other

b : the study or discrimination of synonyms

2 : the scientific names that have been used to designate the same taxonomic group (such as a species) also : a list of these

3 : the quality or state of being synonymous

First Known Use of synonymy

1683, in the meaning defined at sense 1a

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The first known use of synonymy was in 1683

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syn·​on·​y·​my | \-mē \
plural synonymies

Medical Definition of synonymy 

: the scientific names that have been used in different publications to designate a taxonomic group (as a species) also : a list of these

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More from Merriam-Webster on synonymy

Rhyming Dictionary: Words that rhyme with synonymy

Britannica English: Translation of synonymy for Arabic Speakers Encyclopedia article about synonymy

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living or existing for a long time

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