One control can refer to many different actions depending on the context in which it is used. Some synonyms for one control include monitor, regulate, manage, oversee, govern, supervise, administer, direct, and command. Each of these synonyms implies a different level of authority or responsibility, but they all share the common theme of being in charge of a particular situation or activity. One control can also refer to a single button, switch, or lever that is used to operate a machine or device. In this sense, synonyms for one control might include adjust, manipulate, operate, turn, or switch. Ultimately, the exact synonym for one control will depend on the particular situation or context in which it is used.