keratoplasty vs plastic surgery

keratoplasty and plastic surgery both are nouns.

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

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

keratoplasty: a surgical procedure in which part or all of a damaged or diseased cornea is replaced by healthy corneal tissue from a donor
plastic surgery: surgery concerned with therapeutic or cosmetic reformation of tissue

Other hypernyms of keratoplasty include anaplasty, reconstructive surgery, organ transplant, transplant, transplantation.

keratoplasty (noun)	plastic surgery (noun)
a surgical procedure in which part or all of a damaged or diseased cornea is replaced by healthy corneal tissue from a donor	surgery concerned with therapeutic or cosmetic reformation of tissue