redeemer vs redeem

redeemer is a noun but redeem is not a noun.

Word	Noun	Adjective	Verb	Adverb
redeemer	Yes	No	No	No
redeem	No	No	Yes	No

redeemer (noun)	redeem (noun)
someone who redeems or buys back (promissory notes or merchandise or commercial paper etc.)

redeemer (verb)	redeem (verb)
	convert into cash; of commercial papers
	pay off (loans or promissory notes)
	exchange or buy back for money; under threat
	to turn in (vouchers or coupons) and receive something in exchange
	restore the honor or worth of
	save from sins