A sewer system is a crucial part of modern day infrastructure. However, there may be times when you need to describe it in a different way. Synonyms for sewer system include drainage system, waste disposal system, water sanitation network, and wastewater collection system. These terms all describe the same thing, but using different words can add variety and precision to your language. Whether you are discussing water management or urban planning, it's important to have a range of vocabulary at your disposal. So next time you're struggling to find the right word for a sewer system, consider one of these synonyms.