The Collaborative International Dictionary of English v.0.48:

Reveal \Re*veal"\, n.
   1. A revealing; a disclosure. [Obs.]
      [1913 Webster]

   2. (Arch.) The side of an opening for a window, doorway, or
      the like, between the door frame or window frame and the
      outer surface of the wall; or, where the opening is not
      filled with a door, etc., the whole thickness of the wall;
      the jamb. [Written also revel.]
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Reveal \Re*veal"\, v. t. [imp. & p. p. Revealed; p. pr. & vb.
   n. Revealing.] [F. r['e]v['e]ler, L. revelare, revelatum,
   to unveil, reveal; pref. re- re- + velare to veil; fr. velum
   a veil. See Veil.]
   1. To make known (that which has been concealed or kept
      secret); to unveil; to disclose; to show.
      [1913 Webster]

            Light was the wound, the prince's care unknown,
            She might not, would not, yet reveal her own.
                                                  --Waller.
      [1913 Webster]

   2. Specifically, to communicate (that which could not be
      known or discovered without divine or supernatural
      instruction or agency).
      [1913 Webster]

   Syn: To communicate; disclose; divulge; unveil; uncover;
        open; discover; impart; show.

   Usage: See Communicate. -- Reveal, Divulge. To reveal
          is literally to lift the veil, and thus make known
          what was previously concealed; to divulge is to
          scatter abroad among the people, or make publicly
          known. A mystery or hidden doctrine may be revealed;
          something long confined to the knowledge of a few is
          at length divulged. "Time, which reveals all things,
          is itself not to be discovered." --Locke. "A tragic
          history of facts divulged." --Wordsworth.
          [1913 Webster]

WordNet (r) 3.0 (2006):

reveal
    v 1: make visible; "Summer brings out bright clothes"; "He
         brings out the best in her" [syn: uncover, bring out,
         unveil, reveal]
    2: make known to the public information that was previously
       known only to a few people or that was meant to be kept a
       secret; "The auction house would not disclose the price at
       which the van Gogh had sold"; "The actress won't reveal how
       old she is"; "bring out the truth"; "he broke the news to
       her"; "unwrap the evidence in the murder case" [syn:
       unwrap, disclose, let on, bring out, reveal,
       discover, expose, divulge, break, give away, let
       out]
    3: disclose directly or through prophets; "God rarely reveal his
       plans for Mankind"

Moby Thesaurus II by Grady Ward, 1.0:

157 Moby Thesaurus words for "reveal":
   affect, air, argue, bare, be indicative of, be significant of,
   be symptomatic of, bespeak, betoken, betray, brandish, break it to,
   break the news, break the seal, breathe, bring forth,
   bring forward, bring into view, bring out, bring to light,
   bring to notice, characterize, clear, come out with, communicate,
   confide, confide to, connote, dangle, demonstrate, denominate,
   denote, deobstruct, develop, differentiate, dig up, disclose,
   discover, disinter, dismask, display, divulgate, divulge,
   dramatize, draw the veil, embody, enact, entail, evidence, evince,
   evulgate, excavate, exhibit, exhume, expose, expose to view,
   express, ferret out, fish up, flaunt, flourish, free, give,
   give evidence, give out, give sign, give token, give vent to,
   highlight, hint, identify, illuminate, impart, incarnate, indicate,
   involve, lay bare, lay open, leak out, let daylight in,
   let get around, let in on, let on, let out, let slip, make clear,
   make known, make plain, manifest, mark, materialize, mean, note,
   open, open up, out with, parade, patefy, perform, present, produce,
   publish, raise the curtain, represent, roll out, root up,
   set forth, show, show forth, show up, signify, spotlight,
   stand for, strip bare, suggest, symptomatize, symptomize, tell,
   testify, token, trot out, turn up, unblock, uncase, unclench,
   uncloak, unclog, unclutch, uncork, uncover, uncurtain, undo,
   undrape, unearth, unfold, unfoul, unfurl, unkennel, unlatch,
   unlock, unmask, unpack, unplug, unroll, unscreen, unseal,
   unsheathe, unshroud, unshut, unstop, unveil, unwrap, utter, vent,
   ventilate, wave, worm out