WordNet (r) 3.0 (2006):

exasperated
    adj 1: greatly annoyed; out of patience; "had an exasperated
           look on his face"; "felt exasperated beyond endurance"
           [syn: exasperated, cheesed off, browned off]

Moby Thesaurus II by Grady Ward, 1.0:

42 Moby Thesaurus words for "exasperated":
   aggravated, amplified, angry, annoyed, augmented, bothered,
   browned-off, bugged, burnt-up, chafed, deliberately provoked,
   disturbed, embittered, enhanced, enlarged, exacerbated, galled,
   griped, heated up, heightened, hotted up, huffy, increased,
   intensified, irked, irritated, magnified, miffed, nettled, peeved,
   piqued, provoked, put-out, resentful, riled, roiled, ruffled,
   soured, troubled, vexed, worse, worsened