[n] an ardent and enthusiastic supporter of some person or activity
[n] a person having a strong liking for something
addict, admirer, adorer, animal fancier, backslapper, balletomane, bird fancier, booster, champion, fan, fanatic, fiend, freak, friend, gadgeteer, nut, protagonist, shutterbug, sports fan, supporter
\En*thu"si*ast\, n. [Gr. ?: cf. F. enthousiaste.] One moved or actuated by enthusiasm; as: (a) One who imagines himself divinely inspired, or possessed of some special revelation; a religious madman; a fanatic. (b) One whose mind is wholly possessed and heated by what engages it; one who is influenced by a peculiar; fervor of mind; an ardent and imaginative person. Enthusiasts soon understand each other. --W. Irving. Syn: Visionary; fanatic; devotee; zealot.