The Collaborative International Dictionary of English v.0.48:

narcissism \narcissism\ n.
   An exceptional interest in and admiration for oneself.

   Syn: self-love, narcism.
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

narcissism
    n 1: an exceptional interest in and admiration for yourself;
         "self-love that shut out everyone else" [syn: self-love,
         narcism, narcissism]

Moby Thesaurus II by Grady Ward, 1.0:

98 Moby Thesaurus words for "narcissism":
   acquisitiveness, active algolagnia, algolagnia, algolagny,
   amour propre, amour-propre, amphierotism, autism, autoeroticism,
   bisexuality, careerism, complacency, conceitedness,
   consequentiality, coprophilia, ego trip, egotism, exhibitionism,
   fetishism, graspingness, greed, heterosexuality, homoeroticism,
   homosexualism, homosexuality, incest, incestuousness,
   individualism, interest, lesbianism, masochism, narcism,
   necrophilia, overproudness, overweening pride, paraphilia,
   passive algolagnia, pedophilia, personal aims, personal ambition,
   personal desires, personalism, possessiveness, privatism,
   remoteness, sadism, sadomasochism, sapphism, scotophilia,
   self-absorption, self-admiration, self-advancement,
   self-approbation, self-centeredness, self-complacency,
   self-conceit, self-congratulation, self-consideration,
   self-containment, self-content, self-delight, self-devotion,
   self-endearment, self-esteem, self-gratulation, self-importance,
   self-indulgence, self-infatuation, self-interest,
   self-interestedness, self-jealousy, self-love, self-occupation,
   self-pleasing, self-respect, self-satisfaction, self-seeking,
   self-serving, self-solicitude, self-sufficiency, self-worship,
   selfishness, selfism, sexual inversion, sexual normality,
   sexual preference, smugness, swinging both ways, transvestitism,
   tribadism, tribady, vaingloriousness, vainglory, vainness, vanity,
   voyeurism, zooerastia, zoophilia