Erenow is an old-fashioned term that means "of earlier times" or "in times past." It is a seldom-used word, but there are several synonyms that can be used instead. These synonyms include "formerly," "previously," "in the past," "in former times," "once upon a time," and "back in the day." Each of these words or phrases can convey the same meaning as erenow, but are more commonly used in modern language. Using these words can help you communicate effectively without sounding outdated or archaic.