The phrase "cliff's edge" is often used to describe a precarious or dangerous situation, but there are several synonyms that convey a similar sense of danger and risk. One such synonym is "precipice," which refers to a steep drop-off or sheer face of a cliff. Another option is "abyss," which describes a bottomless pit or chasm that seems to lead to the depths of hell. A third synonym is "brink," which denotes the edge or verge of a cliff or other elevated surface. Other possible synonyms for "cliff's edge" include "ledge," "crags," "outcropping," and "overhang." Ultimately, the choice of synonym depends on the context and tone of the sentence.