pay vs purchase

pay and purchase both are nouns.

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

pay (noun)	purchase (noun)
something that remunerates	the acquisition of something for payment
	the mechanical advantage gained by being in a position to use a lever
	a means of exerting influence or gaining advantage
	something acquired by purchase

pay (verb)	purchase (verb)
dedicate	obtain by purchase; acquire by means of a financial transaction
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