subscriber vs donor

subscriber and donor both are nouns.

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

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

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

Other hypernyms of subscriber include bestower, conferrer, giver, presenter.

subscriber (noun)	donor (noun)
someone who contributes (or promises to contribute) a sum of money	person who makes a gift of property
someone who contracts to receive and pay for a service or a certain number of issues of a publication	(medicine) someone who gives blood or tissue or an organ to be used in another person (the host)
someone who expresses strong approval