hypophysectomise vs surgical operation

hypophysectomise is not a noun while surgical operation is a noun.

Word	Noun	Adjective	Verb	Adverb
hypophysectomise	No	No	Yes	No
surgical operation	Yes	No	No	No

hypophysectomise (noun)	surgical operation (noun)
	a medical procedure involving an incision with instruments; performed to repair damage or arrest disease in a living body

hypophysectomise (verb)	surgical operation (verb)
remove the pituitary glands