Kin (meaning a group of related people)
Some words starting with the letter K are:KiteKittenKryptonKitchenKalemiaKaratKnightKnitkindkookykilling
kitten
KnowKnotKneeKnewKeepKeptKeelKeenKelpKilnKindKite
KeepingKnelledKeelingKillersKingpinKnowing
Kinky!
kangaroos
kilter
kleptomaniacs
kook
Knock, knack
walkedwalkerweakenweakerweaklyweeklywickedwinkedworkedworker
cur