A death struggle is a term that refers to a fight that is intense and often life-threatening. There are many synonyms for this term that can be used in a variety of situations. One synonym that is often used is "agonizing battle" which refers to a fight that is difficult and overwhelming. Another synonym is "life-and-death struggle" which refers to a fight that is so intense that it could result in either life or death. Other synonyms include "mortal combat", "life or death struggle", "deadly fight", and "battle to the death". Regardless of which term is used, all of these synonyms convey the seriousness and gravity of the situation.