A synonym for the word authority?

Here are some synonyms for "authority," depending on the context:

General:

* Power

* Control

* Influence

* Command

* Jurisdiction

* Rule

* Sovereignty

* Leadership

* Expertise

* Prestige

Specific:

* Expert: For someone who is an authority on a subject.

* Official: For someone in a position of authority.

* Government: For a governing body.

* Source: For a reliable source of information.

* Master: For someone who has complete control.

More informal:

* Boss

* Big shot

* Heavyweight

* The man

The best synonym will depend on the specific meaning you want to convey.