blind spot vs optic disk

blind spot and optic disk both are nouns.

Word	Noun	Adjective	Verb	Adverb
blind spot	Yes	No	No	No
optic disk	Yes	No	No	No

As nouns, blind spot and optic disk are synonyms defined as:

blind spot and optic disk: the point where the optic nerve enters the retina; not sensitive to light

Other synonyms of blind spot include optic disc.

blind spot (noun)	optic disk (noun)
the point where the optic nerve enters the retina; not sensitive to light	the point where the optic nerve enters the retina; not sensitive to light
a subject about which you are ignorant or prejudiced and fail to exercise good judgment