- Kathakali
- Kali
- Kalian
- Killer beast
- Killing
- Kilobauh
- Kilometer
- Kilometre
- Kilowatt
- Kimono
- Kin
- Kinanthropometry
- Kind of celibacy consisting of 8 aspects or attributes
- Kind of rice-cake
- Kindergarten
- Kindliness
- Kinetic
- Kinetics
- King dasaratha
- King of persia
- King-cobra
- Kingcraft
- Kingly
- Kingpin
- Kings advisor
- Kink
- Kinship
- Kinswoman
- Kirsch
- Kiss curl
- Kissogram
- Kitchen
- Kitchen-garden
- Kitchenette
- Kitchenware
- Kitsch
- Kitten
- Knacker's yard
- Knackered
- Knackers yard
- Knavish
- Knee-breeches
- Knee-deep
- Kneecap
- Kneel down
- Knelt
- Knick knack
- Knife-edge
- Knightly
- Knock about
- Knock off
- Knock the spots off
- Knock-up
- Knockout
- Knot
- Knottiest
- Know a person by name
- Know a thing or two
- Know inside out
- Know ones onions
- Know ones own mind
- Know the place like the back of ones hand
- Know the time of day
- Know what one is talking about
- Knower
- Knuckle
- Knuckle-under
- Kohinoor
- Kohlrabi
- Konganadu
- Kookaburra
- Kowtow
- Kremlin
- Krm
- Kuiper belt
- Kunti
- Kuruksethra
- Kusa grass
- Kw
- Krait
- Kalidasa
- Kaempferia galanga
- Kafka
- Kaim
- Kalanchoe pinnata
- Kaleidoscope
- Kaliya
- Kame
- Kangaroo
- Kannasa panikkar
- Kapok buds
- Kaput
- Kardex
- Karl max
- Karma
- Kashmir
- Kasi
- Kaurava dynasty
- Keel
- Keen eye