diencephalon vs interbrain

diencephalon and interbrain both are nouns.

Word	Noun	Adjective	Verb	Adverb
diencephalon	Yes	No	No	No
interbrain	Yes	No	No	No

As nouns, diencephalon and interbrain are synonyms defined as:

diencephalon and interbrain: the posterior division of the forebrain; connects the cerebral hemispheres with the mesencephalon

Other synonyms of diencephalon include betweenbrain, thalmencephalon.

diencephalon (noun)	interbrain (noun)
the posterior division of the forebrain; connects the cerebral hemispheres with the mesencephalon	the posterior division of the forebrain; connects the cerebral hemispheres with the mesencephalon