promise vs predict

promise is a noun but predict is not a noun.

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

As verbs, promise and predict are synonyms defined as:

Other synonyms of promise include anticipate, call, forebode, foretell, prognosticate.

promise (noun)	predict (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)	predict (verb)
make a promise or commitment	make a prediction about; tell in advance
promise to undertake or give	indicate, as with a sign or an omen
make a prediction about; tell in advance
give grounds for expectations