contributor vs subscriber

contributor and subscriber both are nouns.

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

As nouns, contributor and subscriber are synonyms defined as:

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

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