purchase vs redemption

purchase and redemption both are nouns.

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

As nouns, redemption is a hyponym of purchase; that is, redemption is a word with a more specific, narrower meaning than purchase:

Other hyponyms of purchase include buyback, repurchase, buying, purchasing.

purchase (noun)	redemption (noun)
the acquisition of something for payment	the act of purchasing back something previously sold
the mechanical advantage gained by being in a position to use a lever	(theology) the act of delivering from sin or saving from evil
a means of exerting influence or gaining advantage	repayment of the principal amount of a debt or security at or before maturity (as when a corporation repurchases its own stock)
something acquired by purchase

purchase (verb)	redemption (verb)
obtain by purchase; acquire by means of a financial transaction