call out vs shout

call out is not a noun while shout is a noun.

Word	Noun	Adjective	Verb	Adverb
call out	No	No	Yes	No
shout	Yes	No	Yes	No

As verbs, call out and shout are synonyms defined as:

Other synonyms of call out include cry, cry out, exclaim, outcry.

call out (noun)	shout (noun)
	a loud utterance; often in protest or opposition

call out (verb)	shout (verb)
call out loudly, as of names or numbers	utter in a loud voice; talk in a loud voice (usually denoting characteristic manner of speaking)
utter aloud; often with surprise, horror, or joy	utter a sudden loud cry
challenge to a duel	utter aloud; often with surprise, horror, or joy
	use foul or abusive language towards