Source : WordNet®

counterattack
     n 1: an attack by a defending force against an attacking enemy
          force in order to regain lost ground or cut off enemy
          advance units etc. [syn: {countermove}]
     2: (chess) an attack that is intended to counter the opponent's
        advantage in another part of the board [syn: {counterplay}]
     v : make a counterattack [syn: {counterstrike}]