lieutenant vs lawman

lieutenant and lawman both are nouns.

Word	Noun	Adjective	Verb	Adverb
lieutenant	Yes	No	No	No
lawman	Yes	No	No	No

As nouns, lawman is a hypernym of lieutenant; that is, lawman is a word with a broader meaning than lieutenant:

Other hypernyms of lieutenant include law officer, peace officer.

lieutenant (noun)	lawman (noun)
an officer in a police force	an officer of the law
a commissioned military officer
an assistant with power to act when his superior is absent
an officer holding a commissioned rank in the United States Navy or the United States Coast Guard; below lieutenant commander and above lieutenant junior grade