call up vs recollect

call up is a noun but recollect is not a noun.

Word	Noun	Adjective	Verb	Adverb
call up	Yes	No	Yes	No
recollect	No	No	Yes	No

As verbs, call up and recollect are synonyms defined as:

call up and recollect: recall knowledge from memory; have a recollection

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

call up (noun)	recollect (noun)
an order to report for military duty

call up (verb)	recollect (verb)
recall knowledge from memory; have a recollection	recall knowledge from memory; have a recollection
get or try to get into communication (with someone) by telephone
bring forward for consideration
call to arms; of military personnel
cause to become available for use, either literally or figuratively