eyeball vs eye

eyeball and eye both are nouns.

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

As verbs, eyeball and eye are synonyms defined as:

eyeball (noun)	eye (noun)
the ball-shaped capsule containing the vertebrate eye	a small hole or loop (as in a needle)
	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

eyeball (verb)	eye (verb)
look at	look at