membrane vs tissue layer

membrane and tissue layer both are nouns.

Word	Noun	Adjective	Verb	Adverb
membrane	Yes	No	No	No
tissue layer	Yes	No	No	No

As nouns, membrane and tissue layer are synonyms defined as:

membrane and tissue layer: a pliable sheet of tissue that covers or lines or connects the organs or cells of animals or plants

membrane (noun)	tissue layer (noun)
a thin pliable sheet of material	a pliable sheet of tissue that covers or lines or connects the organs or cells of animals or plants
a pliable sheet of tissue that covers or lines or connects the organs or cells of animals or plants