shout out vs yell

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

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

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

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

shout out (noun)	yell (noun)
	a loud utterance; often in protest or opposition
	a loud utterance of emotion (especially when inarticulate)

shout out (verb)	yell (verb)
utter a sudden loud cry	utter or declare in a very loud voice
utter in a very loud voice	utter a sudden loud cry