alternation antiaircraft fire battledore and shuttlecock commutation cooperation counterchange curtain fire direct fire dry fire exchange file fire fire fire of demolition firepower fireworks firing flack flak give-and-take ground fire gunfight gunfire gunplay high-angle fire horizontal fire interchange interdiction fire intermutation interplay lex talionis machine-gun fire measure for measure mortar fire musketry mutual admiration mutual support mutual transfer mutuality percussion fire permutation pistol fire quid pro quo raking fire rapid fire reciprocality reciprocation reciprocity retaliation ricochet fire rifle fire shellfire shoot-out shooting something for something time fire tit for tat transposal transposition vertical fire zone fire