rhytidectomy vs plastic surgery

rhytidectomy and plastic surgery both are nouns.

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

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

rhytidectomy: plastic surgery to remove wrinkles and other signs of aging from your face; an incision is made near the hair line and skin is pulled back and excess tissue is excised
plastic surgery: surgery concerned with therapeutic or cosmetic reformation of tissue

Other hypernyms of rhytidectomy include anaplasty, reconstructive surgery.

rhytidectomy (noun)	plastic surgery (noun)
plastic surgery to remove wrinkles and other signs of aging from your face; an incision is made near the hair line and skin is pulled back and excess tissue is excised	surgery concerned with therapeutic or cosmetic reformation of tissue