The phrase "traditional enemy" refers to an opponent with whom one has long-standing conflicts or animosities. There are several synonyms that could be used in place of this phrase. One option is "nemesis," which implies an ongoing rivalry or adversarial relationship. Another possibility is "foe," which connotes a strong and long-standing opposition. Additionally, the term "archrival" suggests a particularly fierce and intense competition, while "adversary" indicates a less personal and more professional opposition. Finally, "opponent" is a general term that can be used to refer to anyone with whom one is competing or conflicting. Each of these synonyms is useful in different contexts where the phrase "traditional enemy" might be too specific or confrontational.