donor vs conferrer

donor and conferrer both are nouns.

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

As nouns, donor and conferrer are synonyms defined as:

Other synonyms of donor include bestower, giver, presenter.

donor (noun)	conferrer (noun)
person who makes a gift of property	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)	someone who converses or confers (as in a conference)