ciliary body vs tissue layer

ciliary body and tissue layer both are nouns.

Word	Noun	Adjective	Verb	Adverb
ciliary body	Yes	No	No	No
tissue layer	Yes	No	No	No

As nouns, tissue layer is a hypernym of ciliary body; that is, tissue layer is a word with a broader meaning than ciliary body:

ciliary body: the part of the tunic of the eye between the choroid coat and the iris
tissue layer: a pliable sheet of tissue that covers or lines or connects the organs or cells of animals or plants

Other hypernyms of ciliary body include membrane.

ciliary body (noun)	tissue layer (noun)
the part of the tunic of the eye between the choroid coat and the iris	a pliable sheet of tissue that covers or lines or connects the organs or cells of animals or plants