shriek vs hollo

shriek and hollo both are nouns.

Word	Noun	Adjective	Verb	Adverb
shriek	Yes	No	Yes	No
hollo	Yes	No	Yes	No

As verbs, hollo is a hypernym of shriek; that is, hollo is a word with a broader meaning than shriek:

Other hypernyms of shriek include call, cry, holler, scream, shout, shout out, squall, yell.

shriek (noun)	hollo (noun)
sharp piercing cry	a very loud utterance (like the sound of an animal)
a high-pitched noise resembling a human cry

shriek (verb)	hollo (verb)
utter a shrill cry	utter a sudden loud cry
	cry hollo
	encourage somebody by crying hollo