Being cautious and careful is always a wise approach to take when we want to stay protected and secure. To achieve this, we may want to use different expressions that convey the same message as "is the safe side." Some alternative phrases include "playing it safe," "erring on the side of caution," "staying on the safe side," or "taking no risks." All of these expressions suggest that being prudent and considering potential hazards, without taking unnecessary chances, can help us avoid problems and stay out of harm's way. In essence, each of these synonyms for "is the safe side" reminds us that safety comes first.