hollo vs outcry

hollo and outcry both are nouns.

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

As nouns, outcry is a hypernym of hollo; that is, outcry is a word with a broader meaning than hollo:

Other hypernyms of hollo include call, cry, shout, vociferation, yell.

hollo (noun)	outcry (noun)
a very loud utterance (like the sound of an animal)	a loud utterance; often in protest or opposition

hollo (verb)	outcry (verb)
utter a sudden loud cry	utter aloud; often with surprise, horror, or joy
cry hollo	shout louder than
encourage somebody by crying hollo