buccaneer vs sea robber

buccaneer and sea robber both are nouns.

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

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

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

Other synonyms of buccaneer include pirate, sea rover.

buccaneer (noun)	sea robber (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

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