Synonyms and related words :
augural, foreboding, forerunning, foreshadowing, foreshowing, foretokening, forewarning, heavy with meaning, indicative, intuitive, meaningful, monitory, ominous, portentous, precautional, precautionary, precursive, precursory, predictive, prefigurative, preindicative, presageful, presaging, prodromal, prodromic, prognostic, prognosticative, significant, warning