subscriber vs subscribe

subscriber is a noun but subscribe is not a noun.

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

subscriber (noun)	subscribe (noun)
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
someone who expresses strong approval

subscriber (verb)	subscribe (verb)
	mark with one's signature; write one's name (on)
	adopt as a belief
	receive or obtain regularly
	offer to buy, as of stocks and shares
	pay (an amount of money) as a contribution to a charity or service, especially at regular intervals