| CK | Cake 
| Others |
| CK | California King
| Others |
| CK | California Kris
| Others |
| CK | Calvin Klein
| Others |
| CK | Canoe Kitty
| Others |
| CK | Captain Kirk
| Others |
| CK | Car Kit
| Others |
| CK | Career Killer
| Others |
| CK | Carlos King
| Others |
| CK | Carolina Kitten
| Others |
| CK | Castara Kid
| Others |
| CK | Cat Killer
| Others |
| CK | Cathy Kathy
| Others |
| CK | Catty Kit
| Others |
| CK | Celebration of Knowledge
| Others |
| CK | Celestial Kingdom
| Others |
| CK | Center Kitchen
| Others |
| CK | Centesimal Korsakovian
| Others |
| CK | Central Kitchen
| Others |
| CK | Cereal Killer
| Others |
| CK | Chak Ki
| Others |
| Ck | chalk
| Others |
| CK | Champa Kurukshetra
| Others |
| CK | Character Kill
| Others |
| CK | Charles K
| Others |
| CK | Charlie Knoll
| Others |
| Ck | check / cheque
| Others |
| CK | Chee Kang
| Others |
| CK | Chee Kong
| Others |
| CK | Chicken Killer
| Others |
| CK | Chip Kill
| Others |
| CK | Chris Kattan
| Others |
| CK | Chris Keeney, Photographer
| Others |
| CK | Chris Kirkpatrick
| Others |
| CK | Chris Kosachuk
| Others |
| CK | Chris Kringle
| Others |
| CK | Christian Kid
| Others |
| CK | Christine Kreuzpaintner
| Others |
| CK | Chuck Klosterman
| Others |
| CK | Chung Kong Plastic Works company
| Others |
| CK | Cindy Knock
| Others |
| CK | Circle K
| Others |
| CK | Clare Keller
| Others |
| CK | Clark Kent
| Others |
| CK | Classy Kid Products
| Others |
| CK | Clear Key
| Others |
| CK | Cleithrum to Keel
| Others |
| CK | Cletus Kasady
| Others |
| CK | Cletus Kassadey
| Others |
| CK | Clinical Knowledge
| Others |
| CK | Close Kall
| Others |
| CK | Coastal Kayak
| Others |
| CK | Coaster Kingdom
| Others |
| CK | Coimbatore Krishnarao Prahalad, Management Professor
| Others |
| CK | Cold Killer
| Others |
| CK | Colin Keller
| Others |
| CK | Collecting Knot
| Others |
| CK | Combat King
| Others |
| CK | Commander Katsuragi
| Others |
| CK | Commander Kid
| Others |
| CK | Commuter Kate
| Others |
| CK | Component Research
| Others |
| CK | Composite Killer
| Others |
| CK | Conductive Keratoplasty
| Others |
| CK | Confirmed Kill
| Others |
| CK | Construction King
| Others |
| CK | Containerized Kitchen
| Others |
| CK | Convent Kajang
| Others |
| CK | Cook Islands
| Others |
| CK | Cool Knight
| Others |
| CK | Coon Kitty
| Others |
| CK | Cop Killer
| Others |
| CK | Country Kitchen
| Others |
| CK | Creatine Kinase
| Others |
| CK | Creatine phosphokinase
| Others |
| CK | Creating Keepsakes
| Others |
| CK | Creating Keepsakes Scrapbook Magazine
| Others |
| CK | Creative Kids
| Others |
| CK | Cricket Kenya
| Cricket |
| CK | Crimson Knight
| Others |
| CK | Crip Killa
| Others |
| CK | Crip Killer
| Others |
| CK | Crip Killin
| Others |
| CK | Crip Kingdom
| Others |
| CK | Crypt Killer
| Others |
| CK | Crypto Key
| Others |
| CK | Crystal Knight
| Others |
| CK | Cvitani'c and Karatzas economic consumption theory
| Others |
| CK | Cyanogen Chloride (Cyanide gas)
| Others |
| CK | Cyber Knife
| Others |
| CK | Cylindrical Keplerian
| Others |
| CK | Cyrus Kurtz
| Others |