n.the semantic relation that holds between two words that can (in a given context) express the same meaning

同義詞：synonymitysynonymousness

Synonymies
New generic synonymies in Baetidae (Ephemeroptera)
Synonymies and related lists in zoology: General proposals, with examples in herpetology
Nomina generica Hepaticarum; References, Types and Synonymies
A Guide to Constructing and Understanding Synonymies for Mammalian Species
Use of molecular markers in detection of synonymies and homonymies in grapevines ( Vitis vinifera L.)
Mexican biogeographic provinces: preliminary scheme, general characterizations, and synonymies
Thamnobryum neckeroides (Bryopsida: Neckeraceae): lectotypification, synonymies, diagnostic characters, habitat and distribution
Phylogenetic utility of five genes for dipteran phylogeny: a test case in the Chironomidae leads to generic synonymies.
Revision of New World Chaenusa Haliday sensu lato (Hymenoptera: Braconidae: Alysiinae), with New Species, Synonymies, Hosts, and Dis...