Angelus Angelus bell alarm alarum bark bawl bellow bid to combat birdcall bugle call call call to arms call-up catchword caterwaul challenge cheer clarion clarion call conscription cry dare defi defy double dare exhortation gage gage of battle gauntlet glove go for broke gung ho halloo holler hollo hoot howl hurrah last post levy mobilization moose call motto muster rally rallying cry rebel yell recruitment reveille roar scream screech shout shriek slogan squall squeal summons taps trumpet call war cry war whoop watchword whistle whoop yammer yap yawl yawp yell yelp yo-ho yowl