surgery vs trepan

surgery and trepan both are nouns.

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

surgery (noun)	trepan (noun)
a medical procedure involving an incision with instruments; performed to repair damage or arrest disease in a living body	a drill for cutting circular holes around a center
a room in a hospital equipped for the performance of surgical operations	a surgical instrument used to remove sections of bone from the skull
a room where a doctor or dentist can be consulted
the branch of medical science that treats disease or injury by operative procedures

surgery (verb)	trepan (verb)
	cut a hole with a trepan, as in surgery