privateersman vs officer

privateersman and officer both are nouns.

Word	Noun	Adjective	Verb	Adverb
privateersman	Yes	No	No	No
officer	Yes	No	Yes	No

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

privateersman: an officer or crew member of a privateer
officer: a person authorized to serve in a position of authority on a vessel

Other hypernyms of privateersman include crew member, crewman, ship's officer.

privateersman (noun)	officer (noun)
an officer or crew member of a privateer	a member of a police force
	someone who is appointed or elected to an office and who holds a position of trust
	any person in the armed services who holds a position of authority or command
	a person authorized to serve in a position of authority on a vessel

privateersman (verb)	officer (verb)
	direct or command as an officer