looter vs despoiler

looter and despoiler both are nouns.

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

As nouns, looter and despoiler are synonyms defined as:

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

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