call up vs call down

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

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

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

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

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

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

call up (verb)	call down (verb)
recall knowledge from memory; have a recollection	censure severely or angrily
get or try to get into communication (with someone) by telephone	summon into action or bring into existence, often as if by magic
bring forward for consideration
call to arms; of military personnel
cause to become available for use, either literally or figuratively