subscribe vs investment

subscribe is not a noun while investment is a noun.

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

subscribe (noun)	investment (noun)
	the act of investing; laying out money or capital in an enterprise with the expectation of profit
	the act of putting on robes or vestments
	the ceremonial act of clothing someone in the insignia of an office; the formal promotion of a person to an office or rank
	outer layer or covering of an organ or part or organism
	the commitment of something other than money (time, energy, or effort) to a project with the expectation of some worthwhile result
	money that is invested with an expectation of profit

subscribe (verb)	investment (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