caul vs embryonic membrane

caul and embryonic membrane both are nouns.

Word	Noun	Adjective	Verb	Adverb
caul	Yes	No	No	No
embryonic membrane	Yes	No	No	No

As nouns, caul and embryonic membrane are synonyms defined as:

caul and embryonic membrane: the inner membrane of embryos in higher vertebrates (especially when covering the head at birth)

Other synonyms of caul include veil.

caul (noun)	embryonic membrane (noun)
the inner membrane of embryos in higher vertebrates (especially when covering the head at birth)	the inner membrane of embryos in higher vertebrates (especially when covering the head at birth)
part of the peritoneum attached to the stomach and to the colon and covering the intestines