The word threatened has several synonyms, which includes endangered, vulnerable, imperiled, menaced, and exposed. Threatened means a potential danger, so for instance, when we say someone is endangered, it implies they are at risk of extinction or harm. Vulnerable means they are susceptible to being harmed or hurt. Imperiled denotes a situation where someone is in imminent danger or peril. Menaced means they are being threatened with harm or danger, and exposed means they are susceptible to harm or danger because of a lack of protection or safety. In conclusion, these synonyms can be used interchangeably to describe a hazardous situation.