domino effect vs outcome

domino effect and outcome both are nouns.

Word	Noun	Adjective	Verb	Adverb
domino effect	Yes	No	No	No
outcome	Yes	No	No	No

As nouns, outcome is a hypernym of domino effect; that is, outcome is a word with a broader meaning than domino effect:

domino effect: the consequence of one event setting off a chain of similar events (like a falling domino causing a whole row of upended dominos to fall)
outcome: a phenomenon that follows and is caused by some previous phenomenon

Other hypernyms of domino effect include consequence, effect, event, issue, result, upshot.

domino effect (noun)	outcome (noun)
the consequence of one event setting off a chain of similar events (like a falling domino causing a whole row of upended dominos to fall)	something that results
	a phenomenon that follows and is caused by some previous phenomenon