plastic surgery vs surgery

plastic surgery and surgery both are nouns.

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

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

plastic surgery: surgery concerned with therapeutic or cosmetic reformation of tissue
surgery: a medical procedure involving an incision with instruments; performed to repair damage or arrest disease in a living body

Other hypernyms of plastic surgery include operation, surgical operation, surgical procedure, surgical process.

plastic surgery (noun)	surgery (noun)
surgery concerned with therapeutic or cosmetic reformation of tissue	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