ocellus vs eye

ocellus and eye both are nouns.

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

As nouns, eye is a hypernym of ocellus; that is, eye is a word with a broader meaning than ocellus:

Other hypernyms of ocellus include oculus, optic.

ocellus (noun)	eye (noun)
an eyelike marking (as on the wings of some butterflies); usually a spot of color inside a ring of another color	a small hole or loop (as in a needle)
an eye having a single lens	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

ocellus (verb)	eye (verb)
	look at