The Collaborative International Dictionary of English v.0.48:

Garment \Gar"ment\, n. [OE. garnement, OF. garnement, garniment,
   fr. garnir to garnish. See Garnish.]
   Any article of clothing, as a coat, a gown, etc.
   [1913 Webster]

         No man putteth a piece of new cloth unto old garment.
                                                  --Matt. ix.
                                                  16.
   [1913 Webster]

WordNet (r) 3.0 (2006):

garment
    n 1: an article of clothing; "garments of the finest silk"
    v 1: provide with clothes or put clothes on; "Parents must feed
         and dress their child" [syn: dress, clothe, enclothe,
         garb, raiment, tog, garment, habilitate, fit
         out, apparel] [ant: discase, disrobe, peel,
         strip, strip down, uncase, unclothe, undress]

Moby Thesaurus II by Grady Ward, 1.0:

112 Moby Thesaurus words for "garment":
   Roman collar, Salvation Army bonnet, apparel, apron, arm, armhole,
   armlet, array, attire, bands, bedizenment, bosom, cap, capuchin,
   cassock, cincture, cingulum, clad, clerical collar, clothes,
   clothing, coattail, collar, collarband, cope, costume, cowl,
   crucifix, cuff, dart, dog collar, drapery, dress, dressing, duds,
   enclothe, episcopal ring, facing, fanon, fashion, fatigues,
   feathers, fig, fly, frock, garb, garments, gear, gore, gown, guise,
   gusset, habiliment, habit, hood, investiture, investment, lap,
   lapel, leg, linen, maniple, mantelletta, mantellone, miter, neck,
   neckband, pallium, pectoral cross, pinafore, placket, pocket,
   pocket flap, rabbi, rag, rags, raiment, robe, robes, rosary,
   sandals, scapular, scarf, seat, shirttail, shoulder pad,
   shovel hat, skullcap, sleeve, soutane, sportswear, stole, strap,
   style, surplice, threads, tiara, tippet, togs, toilette, trim,
   triple crown, tunic, vestment, vesture, waist, wear,
   wearing apparel, wristband, yoke, zipper, zucchetto