Rebellion or revolt (8)
I believe the answer is:
uprising
I believe this is a double definition.
'rebellion' is the first definition.
(I know that rebellion can be written as uprising)
'revolt' is the second definition.
(I know that revolt can be written as uprising)
(Other definitions for uprising that I've seen before include "revolution" , "Rebellion, revolt" , "Insurrection or revolt" , "Insurrection, rebellion" , "Open rebellion" .)