pay vs investment

pay and investment both are nouns.

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

pay (noun)	investment (noun)
something that remunerates	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

pay (verb)	investment (verb)
dedicate
bear (a cost or penalty), in recompense for some action
convey, as of a compliment, regards, attention, etc.; bestow
give money, usually in exchange for goods or services
bring in
do or give something to somebody in return
cancel or discharge a debt
make a compensation for
discharge or settle
render
be worth it