forebrain vs neural structure

forebrain and neural structure both are nouns.

Word	Noun	Adjective	Verb	Adverb
forebrain	Yes	No	No	No
neural structure	Yes	No	No	No

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

forebrain: the anterior portion of the brain; the part of the brain that develops from the anterior part of the neural tube
neural structure: a structure that is part of the nervous system

forebrain (noun)	neural structure (noun)
the anterior portion of the brain; the part of the brain that develops from the anterior part of the neural tube	a structure that is part of the nervous system