eye vs inner city

eye and inner city both are nouns.

Word	Noun	Adjective	Verb	Adverb
eye	Yes	No	Yes	No
inner city	Yes	No	No	No

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

eye: an area that is approximately central within some larger region
inner city: the older and more populated and (usually) poorer central section of a city

eye (noun)	inner city (noun)
a small hole or loop (as in a needle)	the older and more populated and (usually) poorer central section of a city
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

eye (verb)	inner city (verb)
look at