sagacity vs discernment

sagacity and discernment both are nouns.

Word	Noun	Adjective	Verb	Adverb
sagacity	Yes	No	No	No
discernment	Yes	No	No	No

As nouns, sagacity and discernment are synonyms defined as:

sagacity and discernment: the mental ability to understand and discriminate between relations

Other synonyms of sagacity include judgement, judgment, sagaciousness.

sagacity (noun)	discernment (noun)
the trait of forming opinions by distinguishing and evaluating	the trait of judging wisely and objectively
the mental ability to understand and discriminate between relations	the mental ability to understand and discriminate between relations
	the cognitive condition of someone who understands
	perception of that which is obscure
	delicate discrimination (especially of esthetic values)