repayment vs repay

repayment is a noun but repay is not a noun.

Word	Noun	Adjective	Verb	Adverb
repayment	Yes	No	No	No
repay	No	No	Yes	No

repayment (noun)	repay (noun)
the act of returning money received previously
payment of a debt or obligation

repayment (verb)	repay (verb)
	answer back
	pay back
	make repayment for or return something
	act or give recompense in recognition of someone's behavior or actions