The term "premonitor" means a warning or an omen of something bad that is to come. Other synonyms for this word include "forewarning," "foreshadowing," "prophesying," or "presaging." These words connote a sense of anticipation or a foretelling of things to come, giving the listener or reader a sense of urgency to take action or prepare themselves for what is to come. Other related words that suggest a sense of premonition include "portent," "harbinger," "augury," and "prediction." These synonyms all suggest a sense of anticipation and an ability to foresee the future, making them powerful words to use when describing events or situations that have yet to unfold.