subscriber vs contributor

subscriber and contributor both are nouns.

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

As nouns, subscriber and contributor are synonyms defined as:

subscriber and contributor: someone who contributes (or promises to contribute) a sum of money

subscriber (noun)	contributor (noun)
someone who contributes (or promises to contribute) a sum of money	someone who contributes (or promises to contribute) a sum of money
someone who contracts to receive and pay for a service or a certain number of issues of a publication	a writer whose work is published in a newspaper or magazine or as part of a book
someone who expresses strong approval