Entry 2 senses · 2 variants Webster, 1913 Synonymic /(sĭn`ŏ*nĭm"ĭk)/ · Syn·o·nym·ic · IPA n. a. 01 n. The science, or the scientific treatment, of synonymous words. 1. The science, or the scientific treatment, of synonymous words.(Gram.) 02 a. Of or pertaining to synonyms, or synonymic; synonymous. 1. Of or pertaining to synonyms, or synonymic; synonymous.