Synonyms for Forecast (same or very similar meaning)
WordNet sense 1 (a prediction about how something (as the weather) will develop):
prognosisWordNet sense 2 (predict in advance):
calculateWordNet sense 3 (indicate by signs):
augur, betoken, bode, foreshadow, foretell, omen, portend, predict, prefigure, presage, prognosticate, auspicateWordNet sense 4 (judge to be probable):
estimate, figure, reckon, estimate, count onFrom the ODE community, based on WordNetadd/edit