deputy vs peace officer

deputy and peace officer both are nouns.

Word	Noun	Adjective	Verb	Adverb
deputy	Yes	No	No	No
peace officer	Yes	No	No	No

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

Other hypernyms of deputy include law officer, lawman.

deputy (noun)	peace officer (noun)
an assistant with power to act when his superior is absent	an officer of the law
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)