The Collaborative International Dictionary of English v.0.48:

Fetish \Fe"tish\, n., Fetishism \Fe"tish*ism\ (? or ?; 277), n.,
Fetishistic \Fe`tish*is"tic\, a.
   See Fetich, n., Fetichism, n., Fetichistic, a.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Fetich \Fe"tich\, Fetish \Fe"tish\, n.[F. f['e]tiche, from Pg.
   feiti?o, adj., n., sorcery, charm, fr. L. facticius made by
   art, artifical, factitious. See Factitious.]
   1. A material object supposed among certain African tribes to
      represent in such a way, or to be so connected with, a
      supernatural being, that the possession of it gives to the
      possessor power to control that being.
      [1913 Webster]

   2. Any object to which one is excessively devoted. fetichism

WordNet (r) 3.0 (2006):

fetish
    n 1: a form of sexual desire in which gratification depends to
         an abnormal degree on some object or item of clothing or
         part of the body; "common male fetishes are breasts, legs,
         hair, shoes, and underwear"
    2: a charm superstitiously believed to embody magical powers
       [syn: juju, voodoo, hoodoo, fetish, fetich]
    3: excessive or irrational devotion to some activity; "made a
       fetish of cleanliness" [syn: fetish, fetich]

Moby Thesaurus II by Grady Ward, 1.0:

51 Moby Thesaurus words for "fetish":
   Baal, Juggernaut, amulet, bias, charm, compulsion, devil-god,
   fixation, fylfot, gammadion, golden calf, good-luck charm,
   graven image, hoodoo, idee fixe, idol, joss, juju, leaning,
   love charm, luck, lucky bean, lucky piece, madstone, mania, mascot,
   mumbo jumbo, obeah, obsession, partiality, penchant, periapt,
   philter, phylactery, predilection, prejudice, preoccupation,
   prepossession, proclivity, propensity, scarab, scarabaeus,
   scarabee, sudarium, swastika, talisman, thing, totem, veronica,
   voodoo, whammy