squall vs shout out

squall is a noun but shout out is not a noun.

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

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

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

squall (noun)	shout out (noun)
sudden violent winds; often accompanied by precipitation

squall (verb)	shout out (verb)
utter a sudden loud cry	utter a sudden loud cry
make high-pitched, whiney noises	utter in a very loud voice
blow in a squall