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