WordNet (r) 3.0 (2006):

pastiche
    n 1: a musical composition consisting of a series of songs or
         other musical pieces from various sources [syn: medley,
         potpourri, pastiche]
    2: a work of art that imitates the style of some previous work

Moby Thesaurus II by Grady Ward, 1.0:

112 Moby Thesaurus words for "pastiche":
   adoption, all sorts, appropriation, art object, assemblage,
   assortment, assumption, blend, borrowed plumes, brainchild,
   bric-a-brac, broad spectrum, burlesque, caricature, certified copy,
   classic, composite, composition, compound, conglomeration, copy,
   copying, counterfeit, creation, derivation, deriving, design,
   ectype, fair copy, faithful copy, fake, farce, farrago, forgery,
   gallimaufry, grotesque, hash, hodgepodge, hotchpot, hotchpotch,
   icon, image, imitation, infringement, jumble, kitsch, lampoon,
   likeness, magpie, mash, master, masterpiece, masterwork, medley,
   melange, mess, mingle-mangle, miscellany, mishmash, mix, mixed bag,
   mixture, mobile, mockery, mocking, motley, museum piece, nude,
   odds and ends, old master, olio, olla podrida, omnium gatherum,
   omnium-gatherum, parody, pasticcio, patchwork, phony, picture,
   piece, piece of virtu, pirating, plagiarism, plagiary, portrait,
   potpourri, representation, resemblance, salad, salmagundi, satire,
   sauce, scramble, semblance, similitude, simulacrum, simulation,
   squib, stabile, statue, stew, still life, study, takeoff, taking,
   tangle, travesty, virtu, what you will, wicked imitation, work,
   work of art