The Collaborative International Dictionary of English v.0.48:

Gewgaw \Gew"gaw\, n. [OE. gigawe, gugawe, gewgaude, prob. the
   same word as OE. givegove gewgaw, apparently a reduplicated
   form fr. AS. gifan to give; cf. also F. joujou plaything, and
   E. gaud, n. See Give, and cf. Giffgaff.]
   A showy trifle; a toy; a splendid plaything; a pretty but
   worthless bauble.

   Syn: knicknack; bauble; tschotschke.
        [1913 Webster]

              A heavy gewgaw called a crown.      --Dryden.
        [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Gewgaw \Gew"gaw\, a.
   Showy; unreal; pretentious.
   [1913 Webster]

         Seeing his gewgaw castle shine.          --Tennyson.
   [1913 Webster]

WordNet (r) 3.0 (2006):

gewgaw
    n 1: cheap showy jewelry or ornament on clothing [syn: bangle,
         bauble, gaud, gewgaw, novelty, fallal, trinket]

Moby Thesaurus II by Grady Ward, 1.0:

100 Moby Thesaurus words for "gewgaw":
   a continental, a curse, a damn, a darn, a hoot, agate, bagatelle,
   ball, baseball bat, bat, battledore, bauble, bean, bibelot, bijou,
   bit, blocks, brass farthing, bric-a-brac, button, cent,
   checkerboard, chessboard, club, cockhorse, cricket bat, cue, curio,
   doll, doll carriage, farce, farthing, feather, fig, fleabite,
   folderol, fribble, frippery, gaud, gimcrack, golf club, hair,
   halfpenny, hill of beans, hobbyhorse, jack-in-the-box, jacks,
   jackstones, jackstraws, jest, joke, kickshaw, knack, knickknack,
   knickknackery, marble, marionette, mig, minikin, mockery, molehill,
   novelty, paper doll, peppercorn, picayune, pick-up sticks, pin,
   pinch of snuff, pinprick, pinwheel, plaything, puppet, racket,
   rag doll, rap, red cent, rocking horse, row of pins, rush, shit,
   snap, sneeshing, sou, sport, steelie, straw, taw, teetotum, top,
   toy, toy soldier, trifle, trinket, triviality, tuppence, two cents,
   twopence, vanity, whatnot, whim-wham