The Collaborative International Dictionary of English v.0.48:

Angry \An"gry\, a. [Compar. Angrier; superl. Angriest.] [See
   Anger.]
   1. Troublesome; vexatious; rigorous. [Obs.]
      [1913 Webster]

            God had provided a severe and angry education to
            chastise the forwardness of a young spirit. --Jer.
                                                  Taylor.
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   2. Inflamed and painful, as a sore.
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   3. Touched with anger; under the emotion of anger; feeling
      resentment; enraged; -- followed generally by with before
      a person, and at before a thing.
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            Be not grieved, nor angry with yourselves. --Gen.
                                                  xlv. 5.
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            Wherefore should God be angry at thy voice?
                                                  --Eccles. v.
                                                  6.
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   4. Showing anger; proceeding from anger; acting as if moved
      by anger; wearing the marks of anger; as, angry words or
      tones; an angry sky; angry waves. "An angry countenance."
      --Prov. xxv. 23.
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   5. Red. [R.]
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            Sweet rose, whose hue, angry and brave. --Herbert.
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   6. Sharp; keen; stimulated. [R.]
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            I never ate with angrier appetite.    --Tennyson.
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   Syn: Passionate; resentful; irritated; irascible; indignant;
        provoked; enraged; incensed; exasperated; irate; hot;
        raging; furious; wrathful; wroth; choleric; inflamed;
        infuriated.
        [1913 Webster]

WordNet (r) 3.0 (2006):

angry
    adj 1: feeling or showing anger; "angry at the weather"; "angry
           customers"; "an angry silence"; "sending angry letters to
           the papers" [ant: unangry(p)]
    2: (of the elements) as if showing violent anger; "angry clouds
       on the horizon"; "furious winds"; "the raging sea" [syn:
       angry, furious, raging, tempestuous, wild]
    3: severely inflamed and painful; "an angry sore"

Moby Thesaurus II by Grady Ward, 1.0:

121 Moby Thesaurus words for "angry":
   acid, acrimonious, aggravated, algetic, anarchic, angered, annoyed,
   blustering, blusterous, blustery, bothered, browned off,
   browned-off, bugged, burning, burnt-up, caustic, chafed, chaotic,
   choleric, cloudy, corrosive, cross, cyclonic, dirty, discontented,
   disturbed, enraged, exasperated, feeling evil, festering, fiery,
   foul, frantic, frenzied, fuming, furious, galled, griped, heated,
   hellish, in a temper, incensed, indignant, inflamed, infuriate,
   infuriated, insensate, irascible, irate, ireful, irked, irritable,
   irritated, livid, mad, maddened, miffed, mindless, nettled,
   orgasmic, orgastic, out of humor, out of sorts, out of temper,
   pandemoniac, peeved, perturbed, piqued, pissed, pissed off,
   pissed-off, provoked, put out, raging, rainy, rankling, ravening,
   raving, raw, red, red-faced, resentful, riled, riled up, riley,
   rip-roaring, roiled, ruffled, sensitive, shirty, smarting, sore,
   splenetic, storming, stormy, tempestuous, tender, ticked off,
   tingling, tornadic, troubled, troublous, tumultuous, turbulent,
   typhonic, typhoonish, up in arms, uproarious, upset, uptight,
   vexed, waxy, wild, wild-eyed, worked up, wrathful, wrathy, wroth,
   wrought up, wrought-up