redemption vs buyback

redemption and buyback both are nouns.

Word	Noun	Adjective	Verb	Adverb
redemption	Yes	No	No	No
buyback	Yes	No	No	No

As nouns, redemption and buyback are synonyms defined as:

redemption and buyback: the act of purchasing back something previously sold

Other synonyms of redemption include repurchase.

redemption (noun)	buyback (noun)
the act of purchasing back something previously sold	the act of purchasing back something previously sold
(theology) the act of delivering from sin or saving from evil
repayment of the principal amount of a debt or security at or before maturity (as when a corporation repurchases its own stock)