foretelling vs forecast

foretelling and forecast both are nouns.

Word	Noun	Adjective	Verb	Adverb
foretelling	Yes	No	No	No
forecast	Yes	No	Yes	No

As nouns, forecast is a hyponym of foretelling; that is, forecast is a word with a more specific, narrower meaning than foretelling:

foretelling (noun)	forecast (noun)
the art or gift of prophecy (or the pretense of prophecy) by supernatural means	a prediction about how something (as the weather) will develop
a statement made about the future

foretelling (verb)	forecast (verb)
	judge to be probable
	predict in advance
	indicate, as with a sign or an omen