Source : Webster's Revised Unabridged Dictionary (1913)

Insurgence \In*sur"gence\, Insurgency \In*sur"gen*cy\, n.
   A state of insurrection; an uprising; an insurrection.

         A moral insurgence in the minds of grave men against
         the Court of Rome.                       --G. Eliot.

Source : WordNet®

insurgency
     n : an organized rebellion aimed at overthrowing a constituted
         government through the use of subversion and armed
         conflict [syn: {insurgence}]