The Collaborative International Dictionary of English v.0.48:

Personation \Per`son*a"tion\, n.
   The act of personating, or conterfeiting the person or
   character of another; impersonation.
   [1913 Webster]

WordNet (r) 3.0 (2006):

personation
    n 1: imitating the mannerisms of another person [syn:
         impersonation, personation]
    2: acting the part of a character on stage; dramatically
       representing the character by speech and action and gesture
       [syn: portrayal, characterization, enactment,
       personation]

Moby Thesaurus II by Grady Ward, 1.0:

42 Moby Thesaurus words for "personation":
   acting, aping, buffoonery, business, characterization, dumb show,
   embodiment, enacting, enactment, gag, ham, hammy acting, hoke,
   hokum, imitation, impersonation, incarnation, masquerade, mimesis,
   mimicking, mimicry, miming, mummery, overacting, pantomime,
   pantomiming, patter, performance, performing, personification,
   playacting, playing, portrayal, posing, projection, representation,
   slapstick, stage business, stage directions, stage presence, stunt,
   taking a role