surgery vs ligation

surgery and ligation both are nouns.

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

surgery (noun)	ligation (noun)
a medical procedure involving an incision with instruments; performed to repair damage or arrest disease in a living body	(surgery) tying a duct or blood vessel with a ligature (as to prevent bleeding during surgery)
a room in a hospital equipped for the performance of surgical operations
a room where a doctor or dentist can be consulted
the branch of medical science that treats disease or injury by operative procedures