Reserves
Part of speech: noun
Definition: Plural reserve.
Part of speech: verb
Definition: To keep back; to retain.
Example sentence: Surplus RBI reserves can be used for poverty alleviation.
Militia
Part of speech: noun
Definition: An army of trained civilians, which may be an official reserve army, called upon in time of need; the national police force of a country (e.g. Russia, Ukraine, etc.); the entire able-bodied population of a state; or a private force, not under government control.
Example sentence: One night, militia tried to break into our home, and the exterior was riddled with bullets.