"At risk" refers to something or someone who is in danger of harm or damage. There are several synonyms that can be used to describe such a situation. One of the most commonly used terms is "in jeopardy", which implies that something valuable or important is in danger of being lost. Another option is "vulnerable", which suggests that something is exposed and susceptible to harm. "Endangered" is also frequently used to describe a situation in which something or someone is in danger of extinction. Other options include "at hazard", "in peril", and "in danger". Regardless of the term used, all of these synonyms convey a sense of urgency and potential threat.