Knurling is a term used in the manufacturing industry to describe a pattern of raised ridges or bumps on a surface for grip. While it is a specific term, there are several synonyms that can be used in place of it. These include: texturing, embossing, patterning, roughening, and indenting. Texturing describes the creation of a specific texture or pattern onto a surface, while embossing means to create a raised image or design on a surface. Patterning and roughening both refer to the creation of a specific pattern, while indenting means to create a depression on a surface. All of these words can be used in place of knurling depending on the context and desired effect.