hollo vs utter

hollo is a noun but utter is not a noun.

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

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

Other hypernyms of hollo include emit, let loose, let out.

hollo (noun)	utter (noun)
a very loud utterance (like the sound of an animal)

hollo (adjective)	utter (adjective)
	complete and absolute
	without qualification; used informally as (often pejorative) intensifiers

hollo (verb)	utter (verb)
utter a sudden loud cry	express in speech
cry hollo	articulate; either verbally or with a cry, shout, or noise
encourage somebody by crying hollo	express audibly; utter sounds (not necessarily words)
	put into circulation