- Creosote
- Crescent
- Cress
- Cretinism
- Crew
- Cribbage
- Crick
- Crooked
- Crop circle
- Croquis
- Crore
- Cross breed
- Cross eye
- Cross the rubicon
- Cross-border
- Cross-check
- Crouton
- Crowing
- Crowning
- Crupper
- Crude castor oil
- Crudites
- Crudity
- Cruel
- Cubs
- Cry wolf
- Crystalline
- Crystallized
- Crystallography
- Ctrl
- Cubbyhole
- Cube
- Cubist
- Cubit
- Cumber
- Cunning
- Cunning person
- Cunningly
- Cunt
- Cup
- Cup final
- Cup-cake
- Cupboard
- Cupful
- Cupids arrow
- Current asset
- Current events
- Curruption
- Curry
- Curry leaf
- Curry vafour
- Curry-comb
- Curse
- Cursorily
- Cursory
- Curtail step
- Curtailment
- Curtain-raiser
- Curve
- Curved
- Cut out
- Cut through
- Cutback
- Cuticle
- Cutlass
- Cuttlefish
- Cutto
- Cwm
- Cwtch
- Cyber space
- Cybernautics
- Cryptography
- Cryptology
- Crysanthus
- Cyclostyle
- Concuss
- Cannon fodder
- Canonical
- Canonical hours
- Canorous
- Cant make head or tail
- Cantankerous
- Capricon
- Captain
- Capturing elephant
- Car
- Cardiovascular
- Care
- Care for
- Carefulness
- Careless
- Carelessly
- Carelessness
- Caressing word
- Carnage
- Carnalise
- Carney
- Carnival
- Carry on
- Carry weight