WordNet (r) 3.0 (2006):

bugle call
    n 1: a signal broadcast by the sound of a bugle

Moby Thesaurus II by Grady Ward, 1.0:

34 Moby Thesaurus words for "bugle call":
   Angelus, Angelus bell, alarm, alarum, battle cry, birdcall, call,
   call to arms, call-up, catchword, clarion, clarion call,
   conscription, exhortation, go for broke, gung ho, last post, levy,
   mobilization, moose call, muster, rally, rallying cry, rebel yell,
   recruitment, reveille, slogan, summons, taps, trumpet call,
   war cry, war whoop, watchword, whistle