promise vs renege on

promise is a noun but renege on is not a noun.

Word	Noun	Adjective	Verb	Adverb
promise	Yes	No	Yes	No
renege on	No	No	Yes	No

promise (noun)	renege on (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

promise (verb)	renege on (verb)
make a promise or commitment	fail to fulfill a promise or obligation
promise to undertake or give
make a prediction about; tell in advance
give grounds for expectations