Synonyms for Prognostication (same or very similar meaning)
WordNet sense 1 (a sign of something about to happen):
omen, portent, presage, prodigy, prognosticWordNet sense 2 (a statement made about the future):
prediction, forecasting, foretellingWordNet sense 3 (knowledge of the future (usually said to be obtained from a divine source)):
prophecy, vaticinationFrom the ODE community, based on WordNetadd/edit