buccaneering vs hijacking

buccaneering and hijacking both are nouns.

Word	Noun	Adjective	Verb	Adverb
buccaneering	Yes	No	No	No
hijacking	Yes	No	No	No

As nouns, hijacking is a hypernym of buccaneering; that is, hijacking is a word with a broader meaning than buccaneering:

buccaneering: hijacking on the high seas or in similar contexts; taking a ship or plane away from the control of those who are legally entitled to it
hijacking: robbery of a traveller or vehicle in transit or seizing control of a vehicle by the use of force

Other hypernyms of buccaneering include highjacking.

buccaneering (noun)	hijacking (noun)
hijacking on the high seas or in similar contexts; taking a ship or plane away from the control of those who are legally entitled to it	robbery of a traveller or vehicle in transit or seizing control of a vehicle by the use of force