Hamada - Bare rock or rock with a thin veneer of pebble (Arabic)
Reg - Desert pavement of loose stones (N. Africa)
Serir - Desert pavement of loose stones, coarser and older than reg (N. Africa)
Debba - Extensive sandy plain (N. Africa)
Erg - Vast region deeply covered with sand and topped by sand dunes (N. Africa)
Playa - Extremely flat, vegetation free area of silt or clay in the lowest part of a closed basin
Salina - Playa with saline water or kept moist by rising groundwater
Chott - Closed basin containing a dry lake or playa (N. African)