despoiler vs pillager

despoiler and pillager both are nouns.

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

As nouns, despoiler and pillager are synonyms defined as:

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

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