Related Clues:

• Bay, say
• Land at a river's mouth
• Shoreline opening
• River mouth deposit
• River mouth formation
• Rugged coastline feature
• __ of Forth
• American airline
• Boat launch area, perhaps
• A river runs to it
• It may be forming at the mouth
• Increasingly deep inlet
• Narrow passage of water
• Area around the mouth
• Greek triangle