When it comes to waiting for service, there are many phrases that can be used in place of "waiting line." Some common synonyms include "queue," "line-up," "line," "row," and "formation." In certain contexts, phrases like "conga line" or "procession" might also be used. Depending on the location or situation, other phrases might be more appropriate, such as "box office line," "ticket line," or "checkout line." Whatever the circumstance, using synonyms can help to make conversation more interesting and varied, and can also help people to understand the context of the waiting situation more clearly.