joke vs scream

joke and scream both are nouns.

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

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

joke (noun)	scream (noun)
a ludicrous or grotesque act done for fun and amusement	sharp piercing cry
activity characterized by good humor	a joke that seems extremely funny
a triviality not to be taken seriously	a high-pitched noise resembling a human cry
a humorous anecdote or remark intended to provoke laughter

joke (verb)	scream (verb)
act in a funny or teasing way	utter a sudden loud cry
tell a joke; speak humorously	utter or declare in a very loud voice
	make a loud, piercing sound