ectoblast vs germ layer

ectoblast and germ layer both are nouns.

Word	Noun	Adjective	Verb	Adverb
ectoblast	Yes	No	No	No
germ layer	Yes	No	No	No

As nouns, germ layer is a hypernym of ectoblast; that is, germ layer is a word with a broader meaning than ectoblast:

ectoblast: the outer germ layer that develops into skin and nervous tissue
germ layer: (embryology) any of the 3 layers of cells differentiated in embryos following gastrulation

ectoblast (noun)	germ layer (noun)
the outer germ layer that develops into skin and nervous tissue	(embryology) any of the 3 layers of cells differentiated in embryos following gastrulation