choice vs decision

choice and decision both are nouns.

Word	Noun	Adjective	Verb	Adverb
choice	Yes	Yes	No	No
decision	Yes	No	No	No

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

choice (noun)	decision (noun)
the act of choosing or selecting	the act of making up your mind about something
the person or thing chosen or selected	the trait of resoluteness as evidenced by firmness of character or purpose
one of a number of things from which only one can be chosen	a position or opinion or judgment reached after consideration
	the outcome of a game or contest
	(boxing) a victory won on points when no knockout has occurred

choice (adjective)	decision (adjective)
of superior grade
appealing to refined taste