1. Marked by excessive enthusiasm for and intense devotion to a cause or idea
   - fanatic, fanatical, rabid

See also: passionate

• clews
• CLI
• clianthus
• Clianthus formosus
• Clianthus puniceus
• Clianthus speciosus
• Clichy
• Clichy-la-Garenne
• cliché
• clichéd
• click
• click beetle
• click off
• click open
• click-clack
• clickable
• clicker
• clickety-clack
• clickety-click
• client
• client-centered therapy
• client-server
• clientage
• clientele
• cliff