retrieve vs retrieval

retrieve is not a noun while retrieval is a noun.

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

retrieve (noun)	retrieval (noun)
	the act of regaining or saving something lost (or in danger of becoming lost)
	the cognitive operation of accessing information in memory
	(computer science) the operation of accessing information from the computer's memory

retrieve (verb)	retrieval (verb)
recall knowledge from memory; have a recollection
run after, pick up, and bring to the master
go for and bring back
get or find back; recover the use of