Words that have C/K in the middle:

​

Baker
Backward
Taken
Bucket
Cooking
Rocket
Stocking
Jacket
Sticker
Looking

Lucky
Shaken
​Knocking
Leaky
Peeking
Pick-up
Package
Pucker
Sunken
Buckle

Cricket
Market
Racket
Pickle
Chicken
Okay
Cracker
Hockey
Awaken
Make-up

Cookie
Necklace
Looking
Knocking
Checkers
Weekly
Thicken
Sucker
Knuckle
Biker