WordNet (r) 3.0 (2006):

playacting
    n 1: the performance of a part or role in a drama [syn:
         acting, playing, playacting, performing]

Moby Thesaurus II by Grady Ward, 1.0:

82 Moby Thesaurus words for "playacting":
   acting, affectation, appearance, attitudinizing, bluff, bluffing,
   buffoonery, business, characterization, cheating, color, coloring,
   deception, delusion, disguise, dissemblance, dissembling,
   dissimulation, facade, face, fakery, faking, false air,
   false front, false show, falsity, feigning, feint, four-flushing,
   fraud, front, gag, gilt, gloss, ham, hammy acting, hoke, hokum,
   humbug, humbuggery, impersonation, imposture, masquerade,
   meretriciousness, mimesis, mimicking, mimicry, miming, mummery,
   ostentation, outward show, overacting, pantomiming, patter,
   performance, performing, personation, playing, portrayal, pose,
   posing, posture, pretense, pretension, pretext, projection,
   representation, seeming, semblance, sham, show, simulacrum,
   simulation, slapstick, speciousness, stage business,
   stage directions, stage presence, stunt, taking a role, varnish,
   window dressing