raider vs plunderer

raider and plunderer both are nouns.

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

As nouns, raider and plunderer are synonyms defined as:

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

raider (noun)	plunderer (noun)
a corporate investor who intends to take over a company by buying a controlling interest in its stock and installing new management	someone who takes spoils or plunder (as in war)
someone who takes spoils or plunder (as in war)