| verb | be a signal for or a symptom of “These symptoms indicate a serious illness” |
| verb | indicate by signs “These signs bode bad news” |
| indicative | adjective | (usually followed by `of') pointing out or revealing clearly |
| indication | noun | (medicine) a reason to prescribe a drug or perform a procedure |
| indicant | noun | something that serves to indicate or suggest |
| indicator | noun | a signal for attracting attention |
| signal | noun | any nonverbal action or gesture that encodes a message |
| portent | noun | a sign of something about to happen |
| auspice | noun | a favorable omen |
| prognostication | noun | a sign of something about to happen |
| prognosis | noun | a prediction about how something (as the weather) will develop |
| omen | noun | a sign of something about to happen |
| presage | noun | a sign of something about to happen |
| foreshadowing | noun | the act of providing vague advance indications; representing beforehand |
| augur | noun | (ancient Rome) a religious official who interpreted omens to guide public policy |
| prefigurative | adjective | indistinctly prophetic |
| forecast | noun | a prediction about how something (as the weather) will develop |
| predictive | adjective | of or relating to prediction; having value for making predictions |