Artfully persuasive in speech:
— A smooth-tongued hypocrite.

synonyms: glib, glib-tongued.

Roget 933: flattering etc. v.; adulatory; mealy-mouthed, honey-mouthed; honeyed; smooth, smooth-tongued; soapy, oily, unctuous, blandiloquent^†, specious; fine-spoken, fair spoken; plausible, servile, sycophantic, fulsome; courtierly^†, courtier-like.    ... show more