interbrain vs neural structure

interbrain and neural structure both are nouns.

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

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

interbrain: the posterior division of the forebrain; connects the cerebral hemispheres with the mesencephalon
neural structure: a structure that is part of the nervous system

interbrain (noun)	neural structure (noun)
the posterior division of the forebrain; connects the cerebral hemispheres with the mesencephalon	a structure that is part of the nervous system