subscribe vs subscription

subscribe is not a noun while subscription is a noun.

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

subscribe (noun)	subscription (noun)
	a pledged contribution
	the act of signing your name; writing your signature (as on a document)
	agreement expressed by (or as if expressed by) signing your name
	a payment for consecutive issues of a newspaper or magazine for a given period of time

subscribe (verb)	subscription (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