pirate vs commandeer

pirate is a noun but commandeer is not a noun.

Word	Noun	Adjective	Verb	Adverb
pirate	Yes	No	Yes	No
commandeer	No	No	Yes	No

As verbs, pirate and commandeer are synonyms defined as:

Other synonyms of pirate include highjack, hijack.

pirate (noun)	commandeer (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)	commandeer (verb)
take arbitrarily or by force	take arbitrarily or by force
copy illegally; of published material