"Fighting out" is a common phrase used to describe a struggle or battle between two or more opponents. However, there are a variety of synonyms that can be used to convey similar meanings. Some alternate phrases include: battling it out, engaging in combat, clashing, duking it out, waging war, struggling, and squaring off. Each of these phrases carries a unique connotation and may be more appropriate for specific contexts. For example, "battling it out" might suggest a more evenly matched competition, while "waging war" conveys a more intense level of conflict. Choosing the appropriate synonym can enhance the precision and clarity of your writing.