smooth-tongued vs glib

smooth-tongued and glib both are adjectives.

Word	Noun	Adjective	Verb	Adverb
smooth-tongued	No	Yes	No	No
glib	No	Yes	No	No

As adjectives, smooth-tongued and glib are synonyms defined as:

Other synonyms of smooth-tongued include glib-tongued.

smooth-tongued (adjective)	glib (adjective)
artfully persuasive in speech	artfully persuasive in speech
	having only superficial plausibility
	marked by lack of intellectual depth