position effect vs outcome

position effect and outcome both are nouns.

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

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

position effect: (genetics) the effect on the expression of a gene that is produced by changing its location in a chromosome
outcome: a phenomenon that follows and is caused by some previous phenomenon

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

position effect (noun)	outcome (noun)
(genetics) the effect on the expression of a gene that is produced by changing its location in a chromosome	something that results
	a phenomenon that follows and is caused by some previous phenomenon