operate vs trephine

operate is not a noun while trephine is a noun.

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

As verbs, trephine is a hyponym of operate; that is, trephine is a word with a more specific, narrower meaning than operate:

Other hyponyms of operate include desex, desexualise, desexualize, fix, sterilise, sterilize, unsex, face-lift, lift, venesect.

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

operate (verb)	trephine (verb)
perform surgery on	operate on with a trephine
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.