contributor vs conferrer

contributor and conferrer both are nouns.

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

As nouns, conferrer is a hypernym of contributor; that is, conferrer is a word with a broader meaning than contributor:

contributor: someone who contributes (or promises to contribute) a sum of money
conferrer: person who makes a gift of property

Other hypernyms of contributor include bestower, donor, giver, presenter.

contributor (noun)	conferrer (noun)
someone who contributes (or promises to contribute) a sum of money	person who makes a gift of property
a writer whose work is published in a newspaper or magazine or as part of a book	someone who converses or confers (as in a conference)