Vicegerent

Definition:

(a.) Having or exercising delegated power; acting by substitution, or in the place of another.
(a.) Having or exercising delegated power; acting by substitution, or in the place of another.
(n.) An officer who is deputed by a superior, or by proper authority, to exercise the powers of another; a lieutenant; a vicar.

Compare vicegerent with other words:

vicegerent vs. viceroy