Kinetic and kleptomaniac begin with the letter k. They end with the letter c.
Fork.
knapsacks
keynote
mcdonalds
broomstick
outlook, oarlock
Some words beginning with P and ending with K:PackPaddockPadlockPaintworkPaperbackPaperworkParkPartookPassbookPassmarkPatchworkPaybackPaycheckPeacockPeakPebrookPeckPeekPerkPickPickabackPickwickPieceworkPiggybackPillockPinkPinprickPipeworkPipsqueakPitchforkPlacekickPlanckPlankPlasterworkPlaybackPlaybookPlonkPluckPlunkPockPocketbookPockmarkPollackPollockPoppycockPorkPostmarkPothookPotluckPrankPreshrankPreshrinkPreshrunkPresoakPrickPuckPullbackPunk
Kilmarnock
keenkinkingpin
Backpack Bankbook Bareback Basilisk Beadwork Bodywork Bookmark
Not in any dictionary I tried (two of which contain over 250,000 words each).
Turtleneck...