photocoagulation vs surgery

photocoagulation and surgery both are nouns.

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

As nouns, surgery is a hypernym of photocoagulation; that is, surgery is a word with a broader meaning than photocoagulation:

photocoagulation: surgical procedure that uses an intense laser beam to destroy diseased retinal tissue or to make a scar that will hold the retina in cases of detached retina
surgery: a medical procedure involving an incision with instruments; performed to repair damage or arrest disease in a living body

Other hypernyms of photocoagulation include operation, surgical operation, surgical procedure, surgical process.

photocoagulation (noun)	surgery (noun)
surgical procedure that uses an intense laser beam to destroy diseased retinal tissue or to make a scar that will hold the retina in cases of detached retina	a medical procedure involving an incision with instruments; performed to repair damage or arrest disease in a living body
	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