noun
liberator
LIB-uh-ray-ter/ˈlɪbəreɪtər/
A person or force that frees others from oppression.
The crowd greeted the former prisoner as a liberator.

Etymology
The agent ending identifies the person who brings about the freedom expressed by the root. Latin liberator already meant a deliverer—someone who releases others, rather than simply someone who is free.
In context
He was both liberated and liberator. He liberated himself. He went on to liberate others. … Slaves who were still in bondage.
the saviour and liberator of all of womens rights
More examples
- She honored the soldiers who had been her town’s liberators.
- The revolutionary promised to become a liberator rather than another ruler.
- The novel questions whether the arriving army is truly a liberator.
Forms
liberator · liberators
liberate verb — free from confinement or oppression
Similar words
- rescuer
- A rescuer removes people from danger; a liberator frees them from confinement or oppression.
- emancipator
- An emancipator releases people from legal or social bondage; liberator can also describe military or personal liberation.