Synonyms for Prognostic (same or very similar meaning)
WordNet sense 1 (a sign of something about to happen):
omen, portent, presage, prodigy, prognosticationWordNet sense 2 (of or relating to prediction; having value for making predictions):
predictive, prognosticativeWordNet sense 3 (foretelling events as if by supernatural intervention):
prophetic, propheticalFrom the ODE community, based on WordNetadd/edit