neural tube vs ectoderm

neural tube and ectoderm both are nouns.

Word	Noun	Adjective	Verb	Adverb
neural tube	Yes	No	No	No
ectoderm	Yes	No	No	No

As nouns, ectoderm is a hypernym of neural tube; that is, ectoderm is a word with a broader meaning than neural tube:

neural tube: a tube of ectodermal tissue in the embryo from which the brain and spinal cord develop
ectoderm: the outer germ layer that develops into skin and nervous tissue

Other hypernyms of neural tube include ectoblast, exoderm.

neural tube (noun)	ectoderm (noun)
a tube of ectodermal tissue in the embryo from which the brain and spinal cord develop	the outer germ layer that develops into skin and nervous tissue