Synonyms of the word

smooth-tongued

• adj. glib; Able to flatter, seduce, and persuade with words.

glib

• adj. Having a ready flow of words but lacking thought or understanding; superficial; shallow.
• adj. Smooth or slippery.
• adj. Artfully persuasive in nature.
• v. (transitive) To make glib.
• n. (historical) A mass of matted hair worn down over the eyes, formerly worn in Ireland.
• v. (obsolete) To castrate; to geld; to emasculate.

persuasive

• adj. able to persuade; convincing.