embryonic membrane vs caul

embryonic membrane and caul both are nouns.

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

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

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

Other synonyms of embryonic membrane include veil.

embryonic membrane (noun)	caul (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