WordNet (r) 3.0 (2006):

self-absorption
    n 1: preoccupation with yourself to the exclusion of everything
         else

Moby Thesaurus II by Grady Ward, 1.0:

82 Moby Thesaurus words for "self-absorption":
   acquisitiveness, anesthesia, autism, careerism, catatonia, chill,
   chilliness, cold blood, cold heart, coldheartedness, coldness,
   coolness, deadpan, dispassion, dispassionateness, dullness,
   ego trip, egotism, emotional deadness, emotionlessness, frigidity,
   frostiness, graspingness, greed, heartlessness, iciness,
   immovability, impassibility, impassiveness, impassivity,
   individualism, inexcitability, interest, lack of affect,
   lack of feeling, lack of touch, narcissism, objectivity,
   obtuseness, passionlessness, personal aims, personal ambition,
   personal desires, personalism, poker face, possessiveness,
   privatism, remoteness, self-admiration, self-advancement,
   self-centeredness, self-consideration, self-containment,
   self-devotion, self-esteem, self-indulgence, self-interest,
   self-interestedness, self-jealousy, self-occupation, self-pleasing,
   self-seeking, self-serving, self-solicitude, self-sufficiency,
   selfishness, selfism, soullessness, spiritlessness, straight face,
   unemotionalism, unexcitability, unfeeling, unfeelingness,
   unimpressibility, unimpressionableness, unpassionateness,
   unresponsiveness, unsusceptibility, unsympatheticness,
   untouchability, withdrawal