- fight fire with fire,
- fight it out,
- fight off,
- fight or flight reaction,
- fight shy of
Examples from the Web for fight back
The British establishment was furious, and it was the irascible Mayor of London, Boris Johnson, who lead the fight-back.
In a televised address announcing that a fight-back had begun, he promised government forces would retake Mosul.
And now all three regions are at the forefront of the pro-Russian fight-back against the new national leaders in Kiev.
Despite the ISIS fight-back, al-Baghdadi is drawing criticism from important figures within al-Qaeda.Experts: Al Qaeda Infighting In Syria Leaves 700 Dead|Jamie Dettmer|January 15, 2014|DAILY BEAST