sea robber vs buccaneer

sea robber and buccaneer both are nouns.

Word	Noun	Adjective	Verb	Adverb
sea robber	Yes	No	No	No
buccaneer	Yes	No	Yes	No

As nouns, sea robber and buccaneer are synonyms defined as:

sea robber and buccaneer: someone who robs at sea or plunders the land from the sea without having a commission from any sovereign nation

Other synonyms of sea robber include pirate, sea rover.

sea robber (noun)	buccaneer (noun)
someone who robs at sea or plunders the land from the sea without having a commission from any sovereign nation	someone who robs at sea or plunders the land from the sea without having a commission from any sovereign nation

sea robber (verb)	buccaneer (verb)
	live like a buccaneer