- Khus khus grass
- Kibosh
- Kick-off
- Kicking
- Kiddy
- Kidney-bean
- Kidneys
- Kill by inches
- Kill two birds with one stone
- Killed
- Killer
- Kraal
- Kraft
- Killjoy
- Kindheartedness
- Kindle
- Kindled
- Kindness
- Kindred
- Kine
- Kinescope
- Kinesiology
- Kinesthetics
- Kinetic theory
- King
- King of beasts
- King of good times
- King of paddy
- King sravastha
- Kinghood
- Kingless
- Kings english
- Kings evil
- Kingship
- Kismet
- Kiss
- Kiss the rod
- Kit
- Kitchen knife
- Kitchen midden
- Kitchen work
- Kith
- Kitty
- Kiwi bird
- Klaxon
- Kludge
- Knee
- Knee-high
- Knee-joint
- Kph
- Knee-length
- Knell
- Knesset
- Knew
- Knickers
- Knife
- Knight-errant
- Knighthood
- Knit
- Knob
- Knock for six
- Knock on the head
- Knock-on
- Knocker
- Knocking
- Knoll
- Knotted
- Knotted cloth
- Know
- Know-nothing
- Knowable
- Knowingly
- Known
- Knows sama veda
- Kodungalloor
- Kodungalloor deity
- Komodo dragon
- Konkana
- Kook
- Kopek
- Koran
- Kosher
- Kratocracy
- Kraut
- Krona
- Krupi
- Kshatriya and sudra
- Kung fu
- Kunthi
- Kurta
- Kuru dynasty
- Kuttanadu
- Kybosh
- Kymograph
- K
- Kadru
- Kahuna
- Kale
- Kamikaze
- Kamsa