shout out vs shout

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

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

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

Other synonyms of shout out include call, cry, holler, hollo, scream, squall, yell.

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

shout out (verb)	shout (verb)
utter a sudden loud cry	utter in a loud voice; talk in a loud voice (usually denoting characteristic manner of speaking)
utter in a very loud voice	utter a sudden loud cry
	utter aloud; often with surprise, horror, or joy
	use foul or abusive language towards