Silty is an adjective that refers to something that contains or is made up of silt, a soil that is typically fine-grained and dense. There are several synonyms for the word silty, including muddy, sludgy, mucky, and oozy. These words are commonly used to describe soil, sediment, or water that is thick and heavy with particles. Other synonyms for silty may include sedimentary, alluvial, or fluvial, depending on the context in which the word is being used. Whether writing an academic paper or a casual blog post, having a variety of synonyms for silty can add depth and clarity to one's writing.