to go to battle, to leave for the front

exposure (condition of being exposed) / exposure (taking a photograph)

expose (to uncover, make visible, bring to daylight, introduce to) / expose (to subject photographic film to light thus ruining it or taking a picture if controlled)

to release, to emit, to let out, to vent, discharge, to give out

release, emission

election

elect

spew, gush / erupt, explode in anger etc.

creation

go into action