plunderer vs freebooter

plunderer and freebooter both are nouns.

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

As nouns, plunderer and freebooter are synonyms defined as:

plunderer and freebooter: someone who takes spoils or plunder (as in war)

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

plunderer (noun)	freebooter (noun)
someone who takes spoils or plunder (as in war)	someone who takes spoils or plunder (as in war)