corsair vs buccaneer

corsair and buccaneer both are nouns.

Word	Noun	Adjective	Verb	Adverb
corsair	Yes	No	No	No
buccaneer	Yes	No	Yes	No

As nouns, buccaneer is a hypernym of corsair; that is, buccaneer is a word with a broader meaning than corsair:

corsair: a pirate along the Barbary Coast
buccaneer: someone who robs at sea or plunders the land from the sea without having a commission from any sovereign nation

Other hypernyms of corsair include pirate, sea robber, sea rover.

corsair (noun)	buccaneer (noun)
a swift pirate ship (often operating with official sanction)	someone who robs at sea or plunders the land from the sea without having a commission from any sovereign nation
a pirate along the Barbary Coast

corsair (verb)	buccaneer (verb)
	live like a buccaneer