eye vs midstream

eye and midstream both are nouns.

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

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

eye (noun)	midstream (noun)
a small hole or loop (as in a needle)	the middle of a stream
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)	midstream (verb)
look at