- Caravanserai
- Carbolic acid
- Carbonize
- Carburetor
- Carcass
- Carcinoma
- Card
- Cardamom seed
- Cardinal virtues
- Cardiogram
- Cardiomyopathy
- Care about
- Care of
- Careen
- Career woman
- Carefrontation
- Careful
- Caretaker
- Carfax
- Caricature
- Carnatic music
- Carnation
- Carnivore
- 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
- Caster
- Castes
- Castigation, castigator
- Casting
- Casting vote
- Castle in the air
- Castor oil
- Castration
- Casual leave
- Casualness
- Cat bird
- Cat hood
- Catacomb
- Catalogue
- Catalonia
- Catarrh
- Catastrophe
- Catawampus
- Catch napping
- Catchment area
- Catechist
- Categorically
- Cater
- Catering
- Caterpillar
- Catharsis
- Cathartic
- Catherine-wheel
- Catheter
- Cathode
- Cathode-rays
- Catholicism
- Catwalk
- Caucus
- Caudal
- Caught
- Cauldron
- Causal
- Causation
- Causationist
- Cause of action
- Cause-effect relation
- Causeway
- Causing
- Causing delight
- Causing grief
- Causing to
- Cautery
- Cavalry
- Cave temple
- Caveat emptor