trephine vs operate

trephine is a noun but operate is not a noun.

Word	Noun	Adjective	Verb	Adverb
trephine	Yes	No	Yes	No
operate	No	No	Yes	No

As verbs, operate is a hypernym of trephine; that is, operate is a word with a broader meaning than trephine:

Other hypernyms of trephine include operate on.

trephine (noun)	operate (noun)
a surgical instrument used to remove sections of bone from the skull

trephine (verb)	operate (verb)
operate on with a trephine	perform surgery on
	perform a movement in military or naval tactics in order to secure an advantage in attack or defense
	handle and cause to function
	keep engaged
	perform as expected when applied
	direct or control; projects, businesses, etc.