hollo vs yell

hollo and yell both are nouns.

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

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

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

As verbs, hollo and yell are synonyms defined as:

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

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

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

hollo (noun)	yell (noun)
a very loud utterance (like the sound of an animal)	a loud utterance; often in protest or opposition
	a loud utterance of emotion (especially when inarticulate)

hollo (verb)	yell (verb)
utter a sudden loud cry	utter or declare in a very loud voice
cry hollo	utter a sudden loud cry
encourage somebody by crying hollo