contribute vs pay

contribute is not a noun while pay is a noun.

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

As verbs, pay is a hypernym of contribute; that is, pay is a word with a broader meaning than contribute:

contribute (noun)	pay (noun)
	something that remunerates

contribute (verb)	pay (verb)
contribute to some cause	dedicate
bestow a quality on	bear (a cost or penalty), in recompense for some action
provide	convey, as of a compliment, regards, attention, etc.; bestow
be conducive to	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