organ donor vs donor

organ donor and donor both are nouns.

Word	Noun	Adjective	Verb	Adverb
organ donor	Yes	No	No	No
donor	Yes	No	No	No

As nouns, donor is a hypernym of organ donor; that is, donor is a word with a broader meaning than organ donor:

organ donor: someone from whom an organ is taken for transplantation
donor: (medicine) someone who gives blood or tissue or an organ to be used in another person (the host)

organ donor (noun)	donor (noun)
someone from whom an organ is taken for transplantation	person who makes a gift of property
	(medicine) someone who gives blood or tissue or an organ to be used in another person (the host)