There are many synonyms for the phrase "cease talking", each with their own nuances and connotations. One commonly used expression is "hush up", which is a more informal way of telling someone to stop talking. Another phrase, "be quiet", is often used in a more stern or authoritative manner, while "shut up" is considered more impolite and confrontational. "Calm down" or "settle down" could also be used if the person is talking excitedly or with a heightened emotional state. Finally, "stop talking" is the most straightforward and direct way of asking someone to be quiet. Choose the synonym that best fits the context and the relationship with the person you are addressing.