wail vs scream

wail and scream both are nouns.

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

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

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

wail (noun)	scream (noun)
a cry of sorrow and grief	sharp piercing cry
	a joke that seems extremely funny
	a high-pitched noise resembling a human cry

wail (verb)	scream (verb)
cry weakly or softly	utter a sudden loud cry
emit long loud cries	utter or declare in a very loud voice
	make a loud, piercing sound