eye vs city center

eye and city center both are nouns.

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

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

eye (noun)	city center (noun)
a small hole or loop (as in a needle)	the central part 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)	city center (verb)
look at