The Collaborative International Dictionary of English v.0.48:

narcissistic \narcissistic\ adj.
   Having an excessive love of oneself; egocentric; egoistic.

   Syn: egotistic, egotistical, self-loving.
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

narcissistic
    adj 1: characteristic of those having an inflated idea of their
           own importance [syn: egotistic, egotistical,
           narcissistic, self-loving]

Moby Thesaurus II by Grady Ward, 1.0:

61 Moby Thesaurus words for "narcissistic":
   acquisitive, ambitious for self, autistic, careerist, complacent,
   conceited, consequential, egocentric, egocentristic, egoistic,
   egotistical, grasping, greedy, individualistic, narcissan,
   narcissine, narcistic, overproud, overweening, personalistic,
   possessive, privatistic, remote, self, self-absorbed,
   self-admiring, self-advancing, self-approving, self-assuming,
   self-besot, self-centered, self-complacent, self-congratulating,
   self-congratulatory, self-considerative, self-contained,
   self-content, self-contented, self-delighting, self-devoted,
   self-endeared, self-esteeming, self-gratulating, self-gratulatory,
   self-important, self-indulgent, self-interested, self-jealous,
   self-loving, self-occupied, self-pleasing, self-respecting,
   self-satisfied, self-seeking, self-serving, self-sufficient,
   selfish, smug, stuck-up, vain, vainglorious