ocellus vs eyespot

ocellus and eyespot both are nouns.

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

As nouns, ocellus and eyespot are synonyms defined as:

ocellus and eyespot: an eyelike marking (as on the wings of some butterflies); usually a spot of color inside a ring of another color

ocellus (noun)	eyespot (noun)
an eyelike marking (as on the wings of some butterflies); usually a spot of color inside a ring of another color	an eyelike marking (as on the wings of some butterflies); usually a spot of color inside a ring of another color
an eye having a single lens