Crenelating is a term that refers to the process of creating a pattern of indented openings along the top of a wall. Its antonyms, on the other hand, include terms that refer to smooth or flat surfaces, such as leveling, flattening, or smoothing. These terms denote the opposite of crenelating, as they imply the removal of ridges or bumps to create a uniform or even surface. Other antonyms for crenelating may include terms like filling, sealing or capping, as they imply the closing or covering of gaps or spaces instead of creating openings. Depending on the context, these antonyms can offer different options for altering the shape or texture of a surface.