WordNet (r) 3.0 (2006):

nerves
    n 1: an uneasy psychological state; "he suffered an attack of
         nerves" [syn: nervousness, nerves]
    2: control of your emotions; "this kind of tension is not good
       for my nerves"

Moby Thesaurus II by Grady Ward, 1.0:

23 Moby Thesaurus words for "nerves":
   agitation, apprehensiveness, attack of nerves, buck fever,
   case of nerves, excessive irritability, fear, fidgetiness, fidgets,
   morbid excitability, nervosity, nervous stomach, nervousness,
   panic, panickiness, spell of nerves, stage fright, state of nerves,
   tic, trepidation, twitching, uneasiness, vellication