discretionary vs discretion

discretionary is not a noun while discretion is a noun.

Word	Noun	Adjective	Verb	Adverb
discretionary	No	Yes	No	No
discretion	Yes	No	No	No

discretionary (noun)	discretion (noun)
	the trait of judging wisely and objectively
	the power of making free choices unconstrained by external agencies
	knowing how to avoid embarrassment or distress
	refined taste; tact
	freedom to act or judge on one's own

discretionary (adjective)	discretion (adjective)
having or using the ability to act or decide according to your own discretion or judgment
(especially of funds) not earmarked; available for use as needed