Related Clues:

• Land formation named for its usual shape
• See 9 Down
• Greeks' D
• Joined a team
• Mouth feature
• River-mouth formation
• It forms at the mouth
• It may have a big mouth
• Joined as one
• Of one mind
• River-mouth feature
• 'It's time to fly' advertiser
• Cohesive
• Altanta-based airline
• US Airways alternative