iris vs eye

iris and eye both are nouns.

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

iris (noun)	eye (noun)
diaphragm consisting of thin overlapping plates that can be adjusted to change the diameter of a central opening	a small hole or loop (as in a needle)
muscular diaphragm that controls the size of the pupil which in turn controls the amount of light that enters the eye; it forms the colored portion of the eye	the organ of sight
plants with sword-shaped leaves and erect stalks bearing bright-colored flowers composed of three petals and three drooping sepals	good discernment (either visually or as if visually)
	attention to what is seen
	an area that is approximately central within some larger region

iris (verb)	eye (verb)
	look at