- Knuckle coupler
- Knuckle-type coupler
- kinja
- knock-off time
- King of the Wild Stallions
- kolonok
- Krakatoa: East of Java
- kiln hood
- Kadavu musk parrot
- knuckle bone
- knucklebone
- knuckle bones
- knuckle-bones
- knuckle pads
- king plank
- Kakutani's fixed point theorem
- Kleene fixed-point theorem
- Kleene's fixed-point theorem
- kalanchoe
- Keys to Freedom
- Kassel Airport KSF , EDVK
- Kassel-Calden Airport KSF , EDVK
- Kiel Airport , KEL , EDHK
- Klagenfurt Airport , KLU , LOWK
- Kamenz Airport , EDCM
- Karlsruhe-Forchheim Airport , QKA , EDTK
- Koblenz-Winningen Airport ZNV , EDRK
- Konstanz Airport , QKZ , EDTZ
- Killer Buzz
- keep shape
- Knickers Ahoy
- Kinfolk
- kiss of friendship
- Kitty Foyle
- Kitty Foyle: The Natural History of a Woman
- kick plate
- kicking strip
- king spool
- Kingdom of Desmond
