Serrulation refers to the presence of serrated or notched edges on something like a leaf, knife, or saw. Some synonyms that can be used in place of serrulation include jaggedness, toothed, saw-toothed, denticulation, notched, scalloped, and crenulated. All of these words describe a similar appearance of indentation or projection along the edge of an object. Depending on the context, one of these synonyms may be a more appropriate choice. For example, jaggedness might be used to describe the unevenness of a rocky shoreline, while notched might be used to describe a key with teeth.