The Black Mountain should not be confused with the Black Mountains in the east of the National Park, nor with a summit in the Black Mountains that is confusingly also called Black Mountain.
The term "Carmarthen Fans" is sometimes used inaccurately to describe a large part of this massif, whereas it should be restricted to the peaks along the northern escarpment, west of the border with Powys (formerly Brecknockshire), beyond which (to the east) is Fan Brycheiniog.