An innerspring mattress is a type of mattress that consists of a series of metal coils sandwiched between layers of padding. It is a popular choice among people who prefer a firm sleeping surface. However, there are a few synonyms that you can use instead of "innerspring mattress" to describe this type of bedding. Some of these include coil spring mattress, spring mattress, and traditional mattress. These names perfectly describe the mattress's construction and give you a better idea of what to expect when buying one. Each of these names is interchangeable and can be used to refer to an innerspring mattress.