redeem vs ransom

redeem is not a noun while ransom is a noun.

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

As verbs, redeem and ransom are synonyms defined as:

redeem (noun)	ransom (noun)
	the act of freeing from captivity or punishment
	payment for the release of someone
	money demanded for the return of a captured person

redeem (verb)	ransom (verb)
convert into cash; of commercial papers	exchange or buy back for money; under threat
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