The Collaborative International Dictionary of English v.0.48:

egocentric \egocentric\ adj.
   having an attitude which is almost exclusively concerned with
   one's own needs or desires.

   Syn: egoistical, self-centered, self-centred.
        [WordNet 1.5]

The Collaborative International Dictionary of English v.0.48:

egocentric \egocentric\ n.
   a self-centered person with little regard for others.

   Syn: egoist.
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

egocentric
    adj 1: limited to or caring only about yourself and your own
           needs [syn: egoistic, egoistical, egocentric,
           self-centered, self-centred] [ant: altruistic,
           selfless]
    n 1: a self-centered person with little regard for others [syn:
         egocentric, egoist]

Moby Thesaurus II by Grady Ward, 1.0:

35 Moby Thesaurus words for "egocentric":
   Narcissus, braggart, compare, conceited, egocentristic, egoist,
   egoistic, egomaniacal, egotist, egotistic, egotistical,
   individualist, individualistic, know-it-all, narcissan, narcissine,
   narcissist, narcissistic, narcist, narcistic, no modest violet,
   self-absorbed, self-applauding, self-centered, self-conceited,
   self-indulgent, self-interested, self-loving, self-seeking,
   self-serving, selfish, smart aleck, stuck-up, swellhead,
   vainglorious