sagaciousness vs sagacity

sagaciousness and sagacity both are nouns.

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

As nouns, sagaciousness and sagacity are synonyms defined as:

sagaciousness and sagacity: the trait of forming opinions by distinguishing and evaluating

Other synonyms of sagaciousness include judiciousness.

As nouns, sagaciousness and sagacity are synonyms defined as:

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

Other synonyms of sagaciousness include discernment, judgement, judgment.

sagaciousness (noun)	sagacity (noun)
the trait of forming opinions by distinguishing and evaluating	the trait of forming opinions by distinguishing and evaluating
the mental ability to understand and discriminate between relations	the mental ability to understand and discriminate between relations