1. Of or relating to airmail stamps

See also: aerophilately

• clickety-clack
• clickety-click
• client
• client-centered therapy
• client-server
• clientage
• clientele
• cliff
• cliff diving
• cliff dweller
• cliff dwelling
• cliff penstemon
• cliff rose
• cliff swallow
• cliff-brake
• cliff-hanging
• cliffhanger
• Clifford Odets
• Clifford trust
• Cliftonia
• Cliftonia monophylla
• climacteric
• climactic
• climate
• climate change