- Callosity
- Cellulite
- Coarsely
- Cymbalist
- Conjunctivits
- Cornflour
- Coterminus
- Ccd
- Cabby
- Cajole
- Cal
- Calabash
- Calamities
- Calamities in rapid sequence
- Calcify
- Calcite
- Calcium carbonate
- Calculated
- Calcutta
- Caldron
- Calendar year
- Caliban
- Calibrate
- Calk
- Call at
- Call attention to
- Call back
- Call by
- Call centre
- Call in question
- Call names
- Call to action
- Call to bar
- Call upon
- Campaigner
- Campanology
- Camwhore
- Can of worms
- Canalize
- Canard
- Cancerous
- Candicamera
- Candidates
- Candle
- Candy
- Cane chair
- Cantillate
- Cantonment
- Canvas
- Cap-a-pie
- Capacity crowd
- Caper
- Capital
- Capital expenditure
- Capital idea
- Caravanserai
- Carbolic acid
- Carbonize
- Carburetor
- Carcass
- Carcinoma
- Card
- Cardamom seed
- Cardinal virtues
- Cardiogram
- Carol
- Carpel
- Carpenter ant
- Carpet bag
- Carpus
- Carrier
- Carrion crow
- Carry a torch for
- Carry forward
- Carry over
- Carry the day
- Cart off
- Cart-man
- Cartoonist
- Cartwheel
- Carved
- Casein
- Cash crop
- Cash in
- Cashew
- Casing
- Casket
- Catalepsy
- Cast a long shadow
- Cast away
- Cast iron
- Cat bird
- Cat hood
- Catacomb
- Catalogue
- Catalonia
- Catarrh
- Catastrophe
- Catawampus
- Catch napping