sea king vs pirate

sea king and pirate both are nouns.

Word	Noun	Adjective	Verb	Adverb
sea king	Yes	No	No	No
pirate	Yes	No	Yes	No

As nouns, pirate is a hypernym of sea king; that is, pirate is a word with a broader meaning than sea king:

sea king: a Viking pirate chief
pirate: someone who robs at sea or plunders the land from the sea without having a commission from any sovereign nation

Other hypernyms of sea king include buccaneer, sea robber, sea rover.

sea king (noun)	pirate (noun)
a Viking pirate chief	a ship that is manned by pirates
	someone who robs at sea or plunders the land from the sea without having a commission from any sovereign nation
	someone who uses another person's words or ideas as if they were his own

sea king (verb)	pirate (verb)
	take arbitrarily or by force
	copy illegally; of published material