adversary, aggressive, aggressor, ambuscade, antagonism, armada, armory, arsenal, ballistic, battery, besiege, blitz, clash, combat, combatants, conflict, conquer, conquest, conscript, contender, contention, contest, contestant, deadlock, discord, disunite, escalate, feud, foe, foray, grapple, incendiary, incursion, martial, militia, munitions, mutineer, navy, nemesis, onslaught, overthrow, phalanx, provocateur, pugilist, quell, rout, saboteur, salvo, shrapnel, siege, sortie, spat, stymie, trounce, tussle, uprising, vanquish