pituitary gland vs hypophysis

pituitary gland and hypophysis both are nouns.

Word	Noun	Adjective	Verb	Adverb
pituitary gland	Yes	No	No	No
hypophysis	Yes	No	No	No

As nouns, pituitary gland and hypophysis are synonyms defined as:

pituitary gland and hypophysis: the master gland of the endocrine system; located at the base of the brain

Other synonyms of pituitary gland include pituitary, pituitary body.

pituitary gland (noun)	hypophysis (noun)
the master gland of the endocrine system; located at the base of the brain	the master gland of the endocrine system; located at the base of the brain