going to battle, leaving for the front

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 export

submit, present, produce, tender

release, emission

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

election

elect