freebooter vs pillager

freebooter and pillager both are nouns.

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

As nouns, freebooter and pillager are synonyms defined as:

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

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

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