prophesy vs promise

prophesy is not a noun while promise is a noun.

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

As verbs, promise is a hypernym of prophesy; that is, promise is a word with a broader meaning than prophesy:

Other hypernyms of prophesy include anticipate, call, forebode, foretell, predict, prognosticate.

prophesy (noun)	promise (noun)
	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

prophesy (verb)	promise (verb)
predict or reveal through, or as if through, divine inspiration	make a promise or commitment
deliver a sermon	promise to undertake or give
	make a prediction about; tell in advance
	give grounds for expectations