pineal body vs epiphysis cerebri

pineal body and epiphysis cerebri both are nouns.

Word	Noun	Adjective	Verb	Adverb
pineal body	Yes	No	No	No
epiphysis cerebri	Yes	No	No	No

As nouns, pineal body and epiphysis cerebri are synonyms defined as:

pineal body and epiphysis cerebri: a small endocrine gland in the brain; situated beneath the back part of the corpus callosum; secretes melatonin

Other synonyms of pineal body include epiphysis, pineal gland.

pineal body (noun)	epiphysis cerebri (noun)
a small endocrine gland in the brain; situated beneath the back part of the corpus callosum; secretes melatonin	a small endocrine gland in the brain; situated beneath the back part of the corpus callosum; secretes melatonin