Perilousness is a word that describes a dangerous situation or condition that can lead to harm or injury. Synonyms for it include precariousness, hazard, risk, jeopardy, and vulnerability. Precariousness describes something that is unstable, uncertain, or risky. Hazard refers to something that presents danger or risk, while risk describes a situation that involves the potential for harm or loss. Jeopardy means to be at risk of harm or danger. Vulnerability refers to a state of being exposed to potential harm or danger, such as in the case of a vulnerable person who may be at risk of exploitation or abuse.