- kufic
- kukri
- kukuruku
- kulak
- kultur
- kumara
- kumiss
- kummel
- kumquat
- kung-fu
- kungurian stage
- kuomintang
- kuramatsu
- kurchatovium
- kurd
- kurdish
- kurdistan
- kurgan
- kuri
- kurtosis
- kuru
- kvass
- kvetch
- kwashiorkor
- kwela
- kyanization
- kyanize
- kye
- kyle
- kylin
- kylito
- kyloe
- kymogram
- kymograph
- kymographic
- kymoscope
- kynocephalus
- kyphos
- kyphoscoliosis
- kyphosis
- kyphotic
- kyphotic angle
- kyphotic pelvis
- kyrtorrhachic