marshall vs peace officer

marshall and peace officer both are nouns.

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

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

marshall: a law officer having duties similar to those of a sheriff in carrying out the judgments of a court of law
peace officer: an officer of the law

Other hypernyms of marshall include law officer, lawman.

marshall (noun)	peace officer (noun)
a law officer having duties similar to those of a sheriff in carrying out the judgments of a court of law	an officer of the law
(in some countries) a military officer of highest rank