1. A flat resulting from repeated deposits of alluvial material by running water
   - alluvial plain

Type of: flat

• sulla
• sullage
• sullen
• sullenly
• sullenness
• Sullivan
• sully
• sulpha
• sulphadiazine
• sulphanilamide
• sulphanilic acid
• sulphate
• sulphide
• sulphite
• sulphonamide
• sulphone
• sulphonic acid
• sulphur
• sulphur bacteria
• sulphur bottom
• sulphur butterfly
• sulphur dioxide
• sulphur hexafluoride
• sulphur mine
• sulphur mustard