The Collaborative International Dictionary of English v.0.48:

Bespangle \Be*span"gle\, v. t. [imp. & p. p. Bespangled; p.
   pr. & vb. n. Bespangling.]
   To adorn with spangles; to dot or sprinkle with something
   brilliant or glittering.
   [1913 Webster]

         The grass . . . is all bespangled with dewdrops.
                                                  --Cowper.
   [1913 Webster]

WordNet (r) 3.0 (2006):

bespangle
    v 1: decorate with spangles; "the star-spangled banner" [syn:
         spangle, bespangle]
    2: dot or sprinkle with sparkling or glittering objects

Moby Thesaurus II by Grady Ward, 1.0:

60 Moby Thesaurus words for "bespangle":
   band, bar, bead, bejewel, beribbon, bespeckle, bespot, blotch,
   check, checker, dapple, diamond, dot, engrave, feather, figure,
   filigree, flag, flake, fleck, flounce, flower, freckle, garland,
   gem, glitter, harlequin, illuminate, iris, jewel, maculate, marble,
   marbleize, motley, mottle, paint, pepper, plume, polychrome,
   polychromize, rainbow, ribbon, spangle, speck, speckle, splotch,
   spot, sprinkle, stigmatize, stipple, streak, striate, stripe, stud,
   tattoo, tessellate, tinsel, variegate, vein, wreathe