discretion vs discretionary

discretion is a noun but discretionary is not a noun.

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

discretion (noun)	discretionary (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

discretion (adjective)	discretionary (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