Backstitches are commonly used in sewing, embroidery, and other fabric-related crafts. They help to create strong, durable seams by interlocking the threads between two pieces of material. There are several synonyms that can be used instead of "backstitches" depending on the context. For example, "running stitches" are similar to backstitches but create longer lines rather than small, tight stitches. "Whipstitches" are another option for securing fabric edges together. "Overcast stitches" are used to finish the raw edge of the material while also reinforcing it. Finally, "lock stitches" are created by looping the thread back on itself to create a sturdy, interlocking seam.