freebooter vs raider

freebooter and raider both are nouns.

Word	Noun	Adjective	Verb	Adverb
freebooter	Yes	No	No	No
raider	Yes	No	No	No

As nouns, freebooter and raider are synonyms defined as:

Other synonyms of freebooter include despoiler, looter, pillager, plunderer, spoiler.

freebooter (noun)	raider (noun)
someone who takes spoils or plunder (as in war)	a corporate investor who intends to take over a company by buying a controlling interest in its stock and installing new management
	someone who takes spoils or plunder (as in war)