Some words that start and end with the letter K are:
There are plenty of words that end with "tion", but none that start with K unfortunately!
keratinisation
kin
Some compound words that start with K are:keepsakekettledrumkeyboardkeychainkickoffkindheartedknickknackknockoff
Some five letter words that end with K are:blackblinkblockbrickbrinkbrookchickchuckchunkclerkclickclockcluckclunkcrackcrankcreekcrookdrankdrinkdrunkflankflaskfleckflickfrankfreakfriskfrockknockKodakprickquickquirkshirkshookslinkskunksparkstarksteakstickstinkstorkstucktricktruckwhisk
kayakkickkickbackkinkknackknapsackknock
Kayak
kachinakoalaKunaSome words that start with k and end with a:kahunakanakarmakashakavakielbasakleptomaniakoalakwachakwanza
There are plenty of words that end with "tion", but none that start with K unfortunately!
keratinisation
kin
Kick and kilt.
Some words that start with the letter c and end with the letter k include:caulkchickchink (a piece)clackclickclockcluckcock (rooster)cookcrackcrankcrankshaftcreekcreakcrickcroakcrockcrook
keel
kilogramm kaboom
How about these: -kitty -Katy -kooky
Keep, Kelp, Knapp