WordNet (r) 3.0 (2006):

reincarnation
    n 1: embodiment in a new form (especially the reappearance or a
         person in another form); "his reincarnation as a lion"
    2: a second or new birth [syn: reincarnation, rebirth,
       renascence]
    3: the Hindu or Buddhist doctrine that a person may be reborn
       successively into one of five classes of living beings (god
       or human or animal or hungry ghost or denizen of Hell)
       depending on the person's own actions

Moby Thesaurus II by Grady Ward, 1.0:

57 Moby Thesaurus words for "reincarnation":
   avatar, catabolism, catalysis, consubstantiation, corporealization,
   displacement, doubling, duplication, echo, embodiment, heterotopia,
   imitation, incarnation, incorporation, materialization, metabolism,
   metagenesis, metamorphism, metamorphosis, metastasis, metathesis,
   metempsychosis, mutant, mutated form, mutation, permutation,
   personification, plagiarism, quotation, reappearance, rebirth,
   recurrence, redoubling, reduplication, reecho, reembodiment,
   regurgitation, renewal, reoccurrence, repetition, reproduction,
   resumption, return, sport, substantiation, transanimation,
   transfiguration, transfigurement, transformation, transformism,
   translation, translocation, transmigration, transmogrification,
   transmutation, transposition, transubstantiation