olfactory brain vs rhinencephalon

olfactory brain and rhinencephalon both are nouns.

Word	Noun	Adjective	Verb	Adverb
olfactory brain	Yes	No	No	No
rhinencephalon	Yes	No	No	No

As nouns, olfactory brain and rhinencephalon are synonyms defined as:

olfactory brain and rhinencephalon: a center in the cerebral hemispheres that governs the sense of smell in lower animals; in humans it seems to mediate complex emotional behavior

olfactory brain (noun)	rhinencephalon (noun)
a center in the cerebral hemispheres that governs the sense of smell in lower animals; in humans it seems to mediate complex emotional behavior	a center in the cerebral hemispheres that governs the sense of smell in lower animals; in humans it seems to mediate complex emotional behavior