retrieval vs saving

retrieval and saving both are nouns.

Word	Noun	Adjective	Verb	Adverb
retrieval	Yes	No	No	No
saving	Yes	Yes	No	No

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

retrieval: the act of regaining or saving something lost (or in danger of becoming lost)
saving: recovery or preservation from loss or danger

Other hyponyms of retrieval include repossession, reclamation, deliverance, delivery, rescue, ransom, recapture, retaking.

retrieval (noun)	saving (noun)
the act of regaining or saving something lost (or in danger of becoming lost)	an act of economizing; reduction in cost
the cognitive operation of accessing information in memory	the activity of protecting something from loss or danger
(computer science) the operation of accessing information from the computer's memory	recovery or preservation from loss or danger

retrieval (adjective)	saving (adjective)
	bringing about salvation or redemption from sin
	characterized by thriftiness