Synonyms for sewer Found 4 synonyms across 2 meanings for “sewer”. a waste pipe that carries away sewage or surface water (noun) seweragecloaca misfortune resulting in lost effort or money (noun) guttertoilet Explore Related Words Rhymes with sewerSynonyms for sewerageSynonyms for cloacaSynonyms for gutterSynonyms for toilet Synonym Finder | Rhyme Finder | Poetry Editor