call up vs arouse

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

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

As verbs, arouse is a hyponym of call up; that is, arouse is a word with a more specific, narrower meaning than call up:

call up: cause to become available for use, either literally or figuratively
arouse: summon into action or bring into existence, often as if by magic

Other hyponyms of call up include bring up, call down, call forth, conjure, conjure up, evoke, invoke, put forward, raise, stir.

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

call up (verb)	arouse (verb)
recall knowledge from memory; have a recollection	cause to be alert and energetic
get or try to get into communication (with someone) by telephone	cause to become awake or conscious
bring forward for consideration	stop sleeping
call to arms; of military personnel	summon into action or bring into existence, often as if by magic
cause to become available for use, either literally or figuratively	call forth (emotions, feelings, and responses)
	to evoke sexual feelings
	to begin moving