hypophysis vs endocrine gland

hypophysis and endocrine gland both are nouns.

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

As nouns, endocrine gland is a hypernym of hypophysis; that is, endocrine gland is a word with a broader meaning than hypophysis:

hypophysis: the master gland of the endocrine system; located at the base of the brain
endocrine gland: any of the glands of the endocrine system that secrete hormones directly into the bloodstream

Other hypernyms of hypophysis include ductless gland, endocrine.

hypophysis (noun)	endocrine gland (noun)
the master gland of the endocrine system; located at the base of the brain	any of the glands of the endocrine system that secrete hormones directly into the bloodstream