forecast vs betoken

forecast is a noun but betoken is not a noun.

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

As verbs, forecast and betoken are synonyms defined as:

Other synonyms of forecast include augur, auspicate, bode, foreshadow, foretell, omen, portend, predict, prefigure, presage, prognosticate.

As verbs, betoken is a hypernym of forecast; that is, betoken is a word with a broader meaning than forecast:

Other hypernyms of forecast include bespeak, indicate, point, signal.

forecast (noun)	betoken (noun)
a prediction about how something (as the weather) will develop

forecast (verb)	betoken (verb)
judge to be probable	indicate, as with a sign or an omen
predict in advance	be a signal for or a symptom of
indicate, as with a sign or an omen