Collocations for rebel - noun

anti-government
leftist (esp. AmE), left-wing, right-wing
separatist
Communist, Maoist, etc.
former
armed
back-bench (BrE,politics)
The Education Secretary has made further concessions to the back-bench rebels.

band, group

back, help, support
They sent in troops to back the rebels.

attack, fight
defeat
join
lead

be based …
The rebels were based in camps along the border.

advance
attack sth, fight
capture sth, gain control (of sth), regain control (of sth), seize sth, seize control (of sth), take control (of sth)
The rebels seized control of the national radio headquarters.

faction, group, movement
army, fighters, force, forces, militia, soldiers, troops
commander, leader
control
The southern parts of the country had fallen into rebel control.

base, camp, position, stronghold
activity, advance, assault, attack, invasion
cause, movement
new recruits to the rebel cause

against the rebel
military operations against the rebels

rebel against
a group of rebels against the emperor

a bit of a rebel, something of a rebel (esp. BrE)
He's a bit of a rebel (= he doesn't like to obey rules).