promisor vs promise

promisor and promise both are nouns.

Word	Noun	Adjective	Verb	Adverb
promisor	Yes	No	No	No
promise	Yes	No	Yes	No

promisor (noun)	promise (noun)
a person who makes a promise	grounds for feeling hopeful about the future
	a verbal commitment by one person to another agreeing to do (or not to do) something in the future

promisor (verb)	promise (verb)
	make a promise or commitment
	promise to undertake or give
	make a prediction about; tell in advance
	give grounds for expectations