trophoblast vs membrane

trophoblast and membrane both are nouns.

Word	Noun	Adjective	Verb	Adverb
trophoblast	Yes	No	No	No
membrane	Yes	No	No	No

As nouns, membrane is a hypernym of trophoblast; that is, membrane is a word with a broader meaning than trophoblast:

trophoblast: the membrane that forms the wall of the blastocyst in early development; aids implantation in the uterine wall
membrane: a pliable sheet of tissue that covers or lines or connects the organs or cells of animals or plants

Other hypernyms of trophoblast include tissue layer.

trophoblast (noun)	membrane (noun)
the membrane that forms the wall of the blastocyst in early development; aids implantation in the uterine wall	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