The Collaborative International Dictionary of English v.0.48:

Portrayal \Por*tray"al\, n.
   The act or process of portraying; description; delineation.
   [1913 Webster]

WordNet (r) 3.0 (2006):

portrayal
    n 1: a word picture of a person's appearance and character [syn:
         portrayal, portraiture, portrait]
    2: acting the part of a character on stage; dramatically
       representing the character by speech and action and gesture
       [syn: portrayal, characterization, enactment,
       personation]
    3: a representation by picture or portraiture [syn: depicting,
       depiction, portraying, portrayal]
    4: any likeness of a person, in any medium; "the photographer
       made excellent portraits" [syn: portrait, portrayal]
    5: representation by drawing or painting etc [syn: depiction,
       delineation, portrayal]

Moby Thesaurus II by Grady Ward, 1.0:

114 Moby Thesaurus words for "portrayal":
   acting, alphabet, aping, art, blueprint, buffoonery, business,
   cameo, catalog, cataloging, character, character sketch,
   charactering, characterization, chart, choreography,
   conventional representation, dance notation, delineation,
   demonstration, depiction, depictment, description, details,
   diagram, drama, drawing, dumb show, embodiment, enacting,
   enactment, evocation, exemplification, figuration, gag,
   graphic account, ham, hammy acting, head, hieroglyphic, hoke,
   hokum, iconography, ideogram, illustration, image, imagery,
   imaging, imitation, impersonation, impression, incarnation,
   itemization, letter, limning, logogram, logograph, map, masquerade,
   mimesis, mimicking, mimicry, miming, miniature, mummery,
   musical notation, notation, overacting, pantomime, pantomiming,
   particularization, patter, performance, performing, personation,
   personification, photograph, pictogram, picture, picturization,
   plan, playacting, playing, portrait, portraiture, posing,
   prefigurement, presentment, printing, profile, projection,
   realization, rendering, rendition, representation, schema, score,
   script, silhouette, sketch, slapstick, specification,
   stage business, stage directions, stage presence, stunt, syllabary,
   symbol, tablature, taking a role, vignette, vivid description,
   word painting, writing