* horseback * flashback * greenback * drumstick * toothpick * pitchfork
craftwork
knapsacks
kangaroos
Knock, knack
backtrack
Five letter words that end in K are:blackblockbreakbrookchalkcheckchinkchuckchunkclickclockcluckclunkcrankcreekcroakcrookdrankdrinkdrunkflackflankflaskfleckflickflockflunkfrankfreakfriskfrockGreekkayakkioskknackknockquackquarkquickquirkshackshanksharksheikshirkshockshookshuckskulkskunkslacksleekslickslunksmacksmirksmocksnacksneakspanksparkspeakspeckspookspunkstackstalkstunkstarksteakstickstinkstockstorkstuckswank
amok
firetruck
Kinetic and kleptomaniac begin with the letter k. They end with the letter c.
backpack
mcdonalds
keynote