Because there is no consensus over the term which best describes the economic sub-region centred on Bristol and which extends into the historic counties of Somerset and Gloucestershire, the term "Severnside" is sometimes used for that area.
The term is also sometimes used more specifically to refer to the partly undeveloped area north west of Bristol, between Chittening and Severn Beach, where Imperial Chemical Industries built a large chemical plant in the 1960s, known as ICI Severnside.