Under harm can also be expressed as being in danger, at risk, or in jeopardy. These synonyms highlight the precarious situation of a person or thing that is under harm. Other synonyms include vulnerable, exposed, and susceptible. These words emphasize the need for protection and caution in order to avoid possible harm. Another synonym is precarious, which denotes something that is unstable and could easily result in harm. Overall, using synonyms for the phrase 'under harm' enables us to better understand the situation and the possible consequences that need to be avoided at all costs to prevent any harm.