discretion vs free will

discretion and free will both are nouns.

Word	Noun	Adjective	Verb	Adverb
discretion	Yes	No	No	No
free will	Yes	No	No	No

As nouns, discretion and free will are synonyms defined as:

discretion and free will: the power of making free choices unconstrained by external agencies

discretion (noun)	free will (noun)
the trait of judging wisely and objectively	the power of making free choices unconstrained by external agencies
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