decision vs choice

decision and choice both are nouns.

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

As nouns, choice is a hypernym of decision; that is, choice is a word with a broader meaning than decision:

Other hypernyms of decision include option, pick, selection.

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

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