When it comes to public transportation, we use the term "bus line" to describe a specific route operated by a bus company. However, depending on your region or country, there might be some synonyms that you can use. Some people like to refer to it as a "bus route" or "bus service," whereas others might use "bus route number" or "bus schedule." In some parts of the world, you may also hear "busway," "bus lane," or "bus corridor." Additionally, some cities might have a specific name for their bus service, such as "Metro Bus" or "TTC Bus." Regardless of what you call it, buses are an efficient and cost-effective way to get around and connect people to their destinations.