call back vs recall

call back is not a noun while recall is a noun.

Word	Noun	Adjective	Verb	Adverb
call back	No	No	Yes	No
recall	Yes	No	Yes	No

As verbs, call back and recall are synonyms defined as:

Other synonyms of call back include call up, recollect, remember, retrieve, think.

As verbs, call back and recall are synonyms defined as:

As verbs, call back and recall are synonyms defined as:

Other synonyms of call back include call in, withdraw.

call back (noun)	recall (noun)
	the act of removing an official by petition
	the process of remembering (especially the process of recovering information by mental effort)
	a call to return
	a bugle call that signals troops to return
	a request by the manufacturer of a defective product to return the product (as for replacement or repair)

call back (verb)	recall (verb)
recall knowledge from memory; have a recollection	recall knowledge from memory; have a recollection
summon to return	cause one's (or someone else's) thoughts or attention to return from a reverie or digression
return or repeat a telephone call	go back to something earlier
cause to be returned	summon to return
	cause to be returned
	make unavailable; bar from sale or distribution
	bring to mind