SuaviloquyToday’s word

synonymic

Synonymic, n.

Etymology: [Cf. G. synonymik. See Synonymous.]

(Gram.)

The science, or the scientific treatment, of synonymous words.

1 other Webster entry under this spelling

Synonymic, Synonymical, a.

Of or pertaining to synonyms, or synonymic; synonymous.

Shades of meaning

Fernald has no entry of its own for synonymic; he lists it under synonymous.

He lists it without comment; the entries above explain its neighbors.