The Collaborative International Dictionary of English v.0.48:

Infatuation \In*fat`u*a"tion\, n. [LL. infatuatio: cf. F.
   infatuation.]
   The act of infatuating; the state of being infatuated; folly;
   that which infatuates.
   [1913 Webster]

         The infatuations of the sensual and frivolous part of
         mankind are amazing; but the infatuations of the
         learned and sophistical are incomparably more so. --I.
                                                  Taylor.
   [1913 Webster]

         Such is the infatuation of self-love.    --Blair.
   [1913 Webster]

WordNet (r) 3.0 (2006):

infatuation
    n 1: a foolish and usually extravagant passion or love or
         admiration
    2: temporary love of an adolescent [syn: puppy love, calf
       love, crush, infatuation]
    3: an object of extravagant short-lived passion

Moby Thesaurus II by Grady Ward, 1.0:

67 Moby Thesaurus words for "infatuation":
   affection, ardor, blind faith, bug, calf love, case, craze,
   crazy fancy, credulity, credulousness, crush, devotion,
   disposition to believe, dotage, ease of belief, enthusiasm,
   fanaticism, fascination, fondness, frenzy, furor, furore, fury,
   gross credulity, gust, gusto, likes, liking, love, mania,
   manic-depressive psychosis, mash, obsession, overambitiousness,
   overanxiety, overanxiousness, overcredulity, overcredulousness,
   overeagerness, overenthusiasm, overopenness to conviction,
   overtrustfulness, overzealousness, pash, passing fancy, passion,
   puppy love, rage, rash conviction, relish, stultification, taste,
   trustfulness, uncritical acceptance, uncriticalness,
   unquestioning belief, unripe acceptation, unskepticalness,
   unsuspectingness, unsuspiciousness, weakness, will to believe,
   willingness to believe, wishful belief, wishful thinking,
   zealotism, zealotry