pillager vs freebooter

pillager and freebooter both are nouns.

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

As nouns, pillager and freebooter are synonyms defined as:

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

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

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