prosencephalon vs forebrain

prosencephalon and forebrain both are nouns.

Word	Noun	Adjective	Verb	Adverb
prosencephalon	Yes	No	No	No
forebrain	Yes	No	No	No

As nouns, prosencephalon and forebrain are synonyms defined as:

prosencephalon and forebrain: the anterior portion of the brain; the part of the brain that develops from the anterior part of the neural tube

prosencephalon (noun)	forebrain (noun)
the anterior portion of the brain; the part of the brain that develops from the anterior part of the neural tube	the anterior portion of the brain; the part of the brain that develops from the anterior part of the neural tube