wail vs hollo

wail and hollo both are nouns.

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

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

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

wail (noun)	hollo (noun)
a cry of sorrow and grief	a very loud utterance (like the sound of an animal)

wail (verb)	hollo (verb)
cry weakly or softly	utter a sudden loud cry
emit long loud cries	cry hollo
	encourage somebody by crying hollo