What is another word for life-or-death?
Pronunciation: [lˈa͡ɪfɔːdˈɛθ] (IPA) 
"Life-or-death" is a crucial phrase that denotes situations that require immediate attention and swift decision-making. To express this sense in different ways, one can use a range of synonyms such as critical, decisive, vital, indispensable, paramount, urgent, essential, imperative, pivotal, significant, and crucial. These words convey the urgency and gravity of a situation, highlighting the need for quick action and the potential consequences of inaction. From medical emergencies to national security threats, life-or-death situations demand immediate and effective responses. By using these synonyms, one can convey the seriousness of a situation in a more nuanced and precise way, emphasizing the high stakes involved and the need for decisive action.
