trepan vs bore

trepan and bore both are nouns.

Word	Noun	Adjective	Verb	Adverb
trepan	Yes	No	Yes	No
bore	Yes	No	Yes	No

As verbs, bore is a hypernym of trepan; that is, bore is a word with a broader meaning than trepan:

Other hypernyms of trepan include drill.

trepan (noun)	bore (noun)
a drill for cutting circular holes around a center	a hole or passage made by a drill; usually made for exploratory purposes
a surgical instrument used to remove sections of bone from the skull	diameter of a tube or gun barrel
	a high wave (often dangerous) caused by tidal flow (as by colliding tidal currents or in a narrow estuary)
	a person who evokes boredom

trepan (verb)	bore (verb)
cut a hole with a trepan, as in surgery	make a hole, especially with a pointed power or hand tool
	cause to be bored