shout out vs shrill

shout out is not an adjective while shrill is an adjective.

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

As verbs, shrill is a hyponym of shout out; that is, shrill is a word with a more specific, narrower meaning than shout out:

Other hyponyms of shout out include hollo, hurrah, halloo, whoop, pipe, pipe up, shriek, howl, roar, ululate, wail, yaup, yawl, screak, screech, skreak, skreigh, squawk.

shout out (adjective)	shrill (adjective)
	of colors that are bright and gaudy
	having or emitting a high-pitched and sharp tone or tones
	being sharply insistent on being heard

shout out (verb)	shrill (verb)
utter a sudden loud cry	utter a shrill cry
utter in a very loud voice