kick
amok
Kick or kite would work.
Some words starting with the letter K are:KiteKittenKryptonKitchenKalemiaKaratKnightKnitkindkookykilling
4 letter word that starts with k
kitten
KeepingKnelledKeelingKillersKingpinKnowing
kneePatella is the scientific name for the knee cap.
kilter
kleptomaniacs
Kinky!
kangaroos