The phrase "be no more" generally refers to something that has come to an end, ceased to exist, or passed away. There are several synonyms that can be used in place of this phrase, depending on the context. Some of these include "cease to be," "expire," "perish," "vanish," "disappear," "come to an end," and "pass away." Each of these synonyms carries a slightly different connotation, making them all useful for different situations. For instance, "vanish" and "disappear" might be more appropriate for speaking about something sudden and unexplained, whereas "come to an end" and "cease to be" could be used for describing a gradual change or decline.