visceral brain vs limbic system

visceral brain and limbic system both are nouns.

Word	Noun	Adjective	Verb	Adverb
visceral brain	Yes	No	No	No
limbic system	Yes	No	No	No

As nouns, visceral brain and limbic system are synonyms defined as:

visceral brain and limbic system: a system of functionally related neural structures in the brain that are involved in emotional behavior

Other synonyms of visceral brain include limbic brain.

visceral brain (noun)	limbic system (noun)
a system of functionally related neural structures in the brain that are involved in emotional behavior	a system of functionally related neural structures in the brain that are involved in emotional behavior