howler vs scream

howler and scream both are nouns.

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

As nouns, howler and scream are synonyms defined as:

Other synonyms of howler include belly laugh, riot, sidesplitter, thigh-slapper, wow.

howler (noun)	scream (noun)
a glaring blunder	sharp piercing cry
monkey of tropical South American forests having a loud howling cry	a joke that seems extremely funny
a joke that seems extremely funny	a high-pitched noise resembling a human cry

howler (verb)	scream (verb)
	utter a sudden loud cry
	utter or declare in a very loud voice
	make a loud, piercing sound