sagacity vs eye

sagacity and eye both are nouns.

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

As nouns, eye is a hyponym of sagacity; that is, eye is a word with a more specific, narrower meaning than sagacity:

sagacity: the mental ability to understand and discriminate between relations
eye: good discernment (either visually or as if visually)

sagacity (noun)	eye (noun)
the trait of forming opinions by distinguishing and evaluating	a small hole or loop (as in a needle)
the mental ability to understand and discriminate between relations	the organ of sight
	good discernment (either visually or as if visually)
	attention to what is seen
	an area that is approximately central within some larger region

sagacity (verb)	eye (verb)
	look at