WordNet (r) 3.0 (2006):

camouflage
    n 1: an outward semblance that misrepresents the true nature of
         something; "the theatrical notion of disguise is always
         associated with catastrophe in his stories" [syn:
         disguise, camouflage]
    2: fabric dyed with splotches of green and brown and black and
       tan; intended to make the wearer of a garment made of this
       fabric hard to distinguish from the background [syn:
       camouflage, camo]
    3: device or stratagem for concealment or deceit
    4: the act of concealing the identity of something by modifying
       its appearance; "he is a master of disguise" [syn:
       disguise, camouflage]
    v 1: disguise by camouflaging; exploit the natural surroundings
         to disguise something; "The troops camouflaged themselves
         before they went into enemy territory"

Moby Thesaurus II by Grady Ward, 1.0:

110 Moby Thesaurus words for "camouflage":
   bad copy, bad likeness, becloud, befog, belie, blanket, blind,
   burlesque, caricature, cloak, cloud, color, conceal, concealment,
   contrast, cover, cover up, cover-up, curtain, deception,
   difference, dim, disguise, disparity, dissemblance, dissemble,
   dissimilarity, dissimilate, dissimilation, dissimilitude,
   dissimulate, distort, distract attention from, divergence,
   diversity, domino, dress up, eclipse, embellish, embroider,
   ensconce, enshroud, envelop, exaggerate, facade, false colors,
   false face, false front, falsify, fudge, garble, gild, gloss,
   gloss over, guise, hide, incognito, incommensurability,
   incomparability, keep under cover, makeup, mask, masque,
   masquerade, mere caricature, miscite, miscolor, misquote,
   misreport, misrepresent, misstate, misteach, mummery,
   nonuniformity, obfuscate, obscure, occult, overdraw, overstate,
   parody, pervert, poor imitation, protective coloration, screen,
   shade, show, shroud, slant, slur over, smoke screen, strain,
   titivate, travesty, trick out, trickery, twist, understate,
   unlikeness, unresemblance, unsameness, unsimilarity, varnish, vary,
   veil, visor, vizard, vizard mask, warp, whitewash, wrench