privateer vs crew member

privateer and crew member both are nouns.

Word	Noun	Adjective	Verb	Adverb
privateer	Yes	No	No	No
crew member	Yes	No	No	No

As nouns, crew member is a hypernym of privateer; that is, crew member is a word with a broader meaning than privateer:

Other hypernyms of privateer include crewman, officer, ship's officer.

privateer (noun)	crew member (noun)
a privately owned warship commissioned to prey on the commercial shipping or warships of an enemy nation	a member of a flight crew
an officer or crew member of a privateer