Synonyms for Glib:

adj.

articulate (adjective)
fluent, expressive, eloquent, direct, intelligible, clear, smooth, lucid, articulate, well-spoken, loquacious, succinct.
offhand (adjective)
offhand.
slick, smooth-talking (adjective)
fluent, loquacious, articulate, plausible, eloquent, facile, smooth-tongued, suave.

n.

backhanded, acrid, cheap, bland, cutting, acid, CODED, allusive, biting, astringent. forceful, facile, dignified, confident, proud, bold, self-possessed, self-confident, assertive, words, self-assured, surface. glib (noun)
plausible, pat, slick, glib-tongued, persuasive, smooth-tongued, superficial.

v.

smooth (verb)
suave, unctuous, smooth-talking, offhand.

Other synonyms:

superficial
superficial, facile.
Other relevant words:
persuasive, glib-tongued, pat, unctuous, slick, offhand, suave, bland, smooth-tongued, plausible, surface, facile, superficial, confident, smooth-talking.

Usage examples for glib

  1. " Here you be, Mr. Balker," said Captain Sullendine when the party reached the quarter- deck; and he was so lively in his movements, and so glib in his speech, as to provoke the suspicion that he had imbibed again at the conclusion of his oration on shore. – A Victorious Union SERIES: The Blue and the Gray--Afloat by Oliver Optic
  2. He never- Oh, don't utter a thing like that, even in jest, she cried, shocked by his glib remark. – The Hollow of Her Hand by George Barr McCutcheon
  3. Well, at his earnest importunitie, after I had moistned my lips, to make my lie run glib to his journies end, forward I went as followeth ... – The English Novel in the Time of Shakespeare by J. J. Jusserand