choroid coat vs choroid

choroid coat and choroid both are nouns.

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

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

choroid coat and choroid: 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 coat (noun)	choroid (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