eye vs midfield

eye and midfield both are nouns.

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

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

eye: an area that is approximately central within some larger region
midfield: (sports) the middle part of a playing field (as in football or lacrosse)

eye (noun)	midfield (noun)
a small hole or loop (as in a needle)	(sports) the middle part of a playing field (as in football or lacrosse)
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)	midfield (verb)
look at