bore vs trepan

bore and trepan both are nouns.

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

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

Other hyponyms of bore include spud, counter-drill.

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

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