giver vs donor

giver and donor both are nouns.

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

As nouns, giver and donor are synonyms defined as:

Other synonyms of giver include bestower, conferrer, presenter.

giver (noun)	donor (noun)
person who makes a gift of property	person who makes a gift of property
someone who devotes himself completely	(medicine) someone who gives blood or tissue or an organ to be used in another person (the host)