The Collaborative International Dictionary of English v.0.48:

Furbish \Fur"bish\, v. t. [imp. & p. p. Furbished; p. pr. &
   vb. n. Furbishing.] [OE. forbischen, OF. forbir, furbir,
   fourbir, F. fourbir, fr. OHG. furban to clean. See -ish.]
   To rub or scour to brightness; to clean; to burnish; as, to
   furbish a sword or spear. --Shak.
   [1913 Webster]

         Furbish new the name of John a Gaunt.    --Shak.
   [1913 Webster]

WordNet (r) 3.0 (2006):

furbish
    v 1: polish and make shiny; "buff the wooden floors"; "buff my
         shoes" [syn: buff, burnish, furbish]

Moby Thesaurus II by Grady Ward, 1.0:

88 Moby Thesaurus words for "furbish":
   adorn, array, beautify, bedeck, bedizen, blazon, brighten up,
   brush up, buff, burnish, color, dandify, deck, deck out, decorate,
   dizen, doll up, dress, dress up, embellish, emblazon, embroider,
   enrich, face-lift, fig out, finish, fix, fix up, freshen,
   furbish up, garnish, glance, glaze, gloss, grace, gussy up, luster,
   ornament, paint, polish, polish up, prank, prank up, preen,
   prettify, primp, primp up, prink, prink up, recondition,
   redecorate, redo, refit, refresh, refurbish, renew, renovate,
   repair, retouch, revamp, revive, rub, rub up, sand, sandblast,
   sandpaper, scour, set off, set out, shine, sleek, slick,
   slick down, smarten, smarten up, smooth, spruce, spruce up,
   titivate, tone up, touch up, trick out, trick up, trim, vamp,
   vamp up, varnish, wax