There are several synonyms for the phrase "watches over," which mean to monitor or supervise something or someone. One such synonym is "oversees," which means to supervise or manage a task. Another synonym is "guards," which implies a sense of protection and vigilance. "Monitors" is another apt synonym, which means to keep a close eye on something in order to track its progress or development. "Superintends" is yet another term that conveys a similar meaning, indicating a sense of authority and control in monitoring something. Lastly, "supervises" is another synonymous term for "watches over," which means to oversee and regulate the conduct of a process or activity.