BLS or Basic Life Support refers to the emergency medical care provided to individuals who are experiencing a life-threatening medical situation. However, there are many other synonyms for BLS. Some of these synonyms include Cardiopulmonary Resuscitation (CPR), Emergency Medical Services (EMS), First Aid, Advanced Life Support (ALS), and Trauma Care. Each of these synonyms is associated with a specific type of emergency medical situation. While they all aim to save a life, they differ in the level of care provided. For instance, First Aid refers to immediate care provided to an individual before professional medical help arrives, while ALS involves more advanced medical care and life-support equipment.