mobilize vs call up

mobilize is not a noun while call up is a noun.

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

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

Other synonyms of mobilize include mobilise, rally.

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

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