vicegerent vs deputy

vicegerent and deputy both are nouns.

Word	Noun	Adjective	Verb	Adverb
vicegerent	Yes	No	No	No
deputy	Yes	No	No	No

As nouns, deputy is a hypernym of vicegerent; that is, deputy is a word with a broader meaning than vicegerent:

Other hypernyms of vicegerent include surrogate.

vicegerent (noun)	deputy (noun)
someone appointed by a ruler as an administrative deputy	an assistant with power to act when his superior is absent
	someone authorized to exercise the powers of sheriff in emergencies
	a person appointed to represent or act on behalf of others
	a member of the lower chamber of a legislative assembly (such as in France)