Fraternizing is a term that is often used to describe behavior that is considered inappropriate or unprofessional, particularly in a workplace or military setting. However, there are many other ways to express this idea using different words or phrases. Some synonyms for fraternizing include socializing, mingling, consorting, fraternization, association, and mixing. Other related terms might include collaborating, teaming up, affiliating, or partnering. No matter what word or phrase you use, however, it is important to be aware of social norms and expectations when it comes to professional behavior, and to avoid engaging in any actions that might be perceived as inappropriate or unprofessional.