Cloacas is a term used to describe a sewer system or waste management facility. However, there are various synonyms that can be used to describe the same thing. The word drain is an excellent alternative to cloacas, as it refers to a system that carries waste and water away. Sewage system, wastewater treatment, and septic tank are also synonyms for cloacas. Other words that describe sewer systems include pipe, canal, and conduit. Additionally, words like gutter and channel are related to Cloacas in that they describe ways in which water or waste can be conveyed. Ultimately, the choice of synonyms for cloacas depends on the context in which the word is being used.