- kith
- kiting
- kiting cheque
- kitsch
- kittchen
- kitten
- kittenish
- kitting
- kittiwake
- kittle
- kitty
- kiva
- kiwi
- kiwi fruit
- kjeldahl method
- klan
- klansman
- klaxon
- klebs-loefflerbacillus
- klebsiella
- kleenex
- klein group
- klepht
- kleptomania
- kleptomaniac
- kleptophobia
- klieg light
- klipspringer
- klondike
- kloof
- kludge
- kluxer
- klystron
- klystron amplifier
- klystron oscillator
- klystron repeater
- km post
- knack
- knacker
- knacker line
- knackered
- knackery
- knackwurst sausage
- knaft paper
- knag
- knaggy
- knaggy wood
- knap
- knapper
- knapping hammer
- knapping machine
- knapsack
- knapweed
- knar
- knarred
- knave
- knavery
- knavish
- knavishly
- knead
- kneader
- kneading
- kneading machine
- kneading table
- kneading-trough
- knee
- knee action
- knee bend
- knee brace
- knee clamp
- knee fold
- knee mechanism
- knee pad
- knee piece
- knee rafter
- knee roof
- knee spanner
- knee table
- knee wall
- knee-boot
- knee-breeches
- knee-cap
- knee-deep
- knee-high
- knee-hole
- knee-jerk
- knee-joint
- knee-length
- knee-pan
- knee-pipe
- kneecap
- kneecapping
- kneed
- kneel
- kneeler
- kneeling position
- kneepiece
- knees-up
- knell
- knelt