Back labor refers to the intense pain experienced by women during childbirth that is concentrated in the lower back region. However, there are other words that can be used to describe the same experience. Such synonyms include posterior labor or backache during labor. Other terms that can be used to describe back labor pain include lumbar pain, spinal pain, and sacral pain. Additionally, some pregnant women may refer to their back labor experience as a "spinal-block pain" or simply a "back pain." Regardless of the term used, back labor is a common experience among expectant mothers, and it is essential to prepare adequately to manage the pain.