There are several synonyms for the phrase "mulled something over," which means to deeply consider or think about something before making a decision. Some examples include: pondered, contemplated, reflected on, deliberated, meditated, ruminate, cogitated, mused, and considered. Each of these words conveys a similar concept of deeply thinking about something, but may have slightly different nuances or connotations. For instance, pondered might suggest a slower and more thoughtful consideration, while deliberated might imply more active weighing of options before reaching a conclusion. Regardless of the specific word used, taking the time to mulled something over is an important step in making informed decisions.