scream vs wail

scream and wail both are nouns.

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

As verbs, wail is a hyponym of scream; that is, wail is a word with a more specific, narrower meaning than scream:

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

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