prophecy vs forecasting

prophecy and forecasting both are nouns.

Word	Noun	Adjective	Verb	Adverb
prophecy	Yes	No	No	No
forecasting	Yes	No	No	No

As nouns, forecasting is a hypernym of prophecy; that is, forecasting is a word with a broader meaning than prophecy:

Other hypernyms of prophecy include foretelling, prediction, prognostication.

prophecy (noun)	forecasting (noun)
knowledge of the future (usually said to be obtained from a divine source)	a statement made about the future
a prediction uttered under divine inspiration