deputy vs vice-regent

deputy and vice-regent both are nouns.

Word	Noun	Adjective	Verb	Adverb
deputy	Yes	No	No	No
vice-regent	Yes	No	No	No

As nouns, vice-regent is a hyponym of deputy; that is, vice-regent is a word with a more specific, narrower meaning than deputy:

Other hyponyms of deputy include second-in-command, vicar-general.

deputy (noun)	vice-regent (noun)
an assistant with power to act when his superior is absent	a regent's deputy
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)