pirate vs rip off

pirate is a noun but rip off is not a noun.

Word	Noun	Adjective	Verb	Adverb
pirate	Yes	No	Yes	No
rip off	No	No	Yes	No

As verbs, rip off is a hypernym of pirate; that is, rip off is a word with a broader meaning than pirate:

Other hypernyms of pirate include rip, steal.

pirate (noun)	rip off (noun)
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

pirate (verb)	rip off (verb)
take arbitrarily or by force	remove by pulling or ripping violently and forcefully
copy illegally; of published material	take without the owner's consent
	deprive somebody of something by deceit