decision vs designation

decision and designation both are nouns.

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

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

Other hyponyms of decision include appointment, assignment, naming, call, move, casting lots, drawing lots, sortition, resolution.

decision (noun)	designation (noun)
the act of making up your mind about something	the act of putting a person into a non-elective position
the trait of resoluteness as evidenced by firmness of character or purpose	the act of designating or identifying something
a position or opinion or judgment reached after consideration	identifying word or words by which someone or something is called and classified or distinguished from others
the outcome of a game or contest
(boxing) a victory won on points when no knockout has occurred