"A war of words" is a phrase used to describe a heated argument or a verbal conflict between two or more people. There are various synonyms for this expression, which can be used to add more variety to your writing. One common phrase is "verbal sparring," which implies a back-and-forth exchange of words between two parties. Alternatively, you could use "feud" to describe a prolonged and bitter disagreement. Other similar phrases include "verbal brawl," "word battle," or "verbal altercation." Overall, these expressions can help you communicate the intensity and emotional charged nature of a disagreement.