choroid vs choroid coat

choroid and choroid coat both are nouns.

Word	Noun	Adjective	Verb	Adverb
choroid	Yes	No	No	No
choroid coat	Yes	No	No	No

As nouns, choroid and choroid coat are synonyms defined as:

choroid and choroid coat: a highly vascular membrane in the eye between the retina and the sclera; a dark pigmentation minimizes the scattering of light inside the eye

choroid (noun)	choroid coat (noun)
a highly vascular membrane in the eye between the retina and the sclera; a dark pigmentation minimizes the scattering of light inside the eye	a highly vascular membrane in the eye between the retina and the sclera; a dark pigmentation minimizes the scattering of light inside the eye