betweenbrain vs thalmencephalon

betweenbrain and thalmencephalon both are nouns.

Word	Noun	Adjective	Verb	Adverb
betweenbrain	Yes	No	No	No
thalmencephalon	Yes	No	No	No

As nouns, betweenbrain and thalmencephalon are synonyms defined as:

betweenbrain and thalmencephalon: the posterior division of the forebrain; connects the cerebral hemispheres with the mesencephalon

Other synonyms of betweenbrain include diencephalon, interbrain.

betweenbrain (noun)	thalmencephalon (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