There are several synonyms for the phrase "fraught with harm," including "risky," "dangerous," "perilous," "precarious," and "hazardous." These words all convey a sense of potential harm or danger, indicating that a situation may result in harm or injury. Similarly, words such as "unsafe," "threatening," "ominous," and "menacing" suggest an atmosphere of potential danger or impending harm. When choosing an appropriate synonym for "fraught with harm," it is important to consider the intended tone and context of the message, as well as the severity of the potential harm.