WWordGenerator.org GeneratorsWord ListsBlogAboutGenerate a word Home / S / sludge sludge noun 6 letters Scrabble 8 WWF 11 Definitions noun any thick, viscous matter googookgoopguckgunkmuckoozeslime noun the precipitate produced by sewage treatment Look “sludge” up elsewhere Wiktionary ↗ Merriam-Webster ↗ Etymonline ↗ Dictionary.com ↗ Want another word?Spin the dictionary for a fresh one. Generate a word →