- Carousel
- Carp
- Carpenter bee
- Carpenters son
- Carpetbagger
- Carriage
- Carriage and pair
- Carriage forward
- Carrot
- Case law
- Case sensitive
- Casement
- Cash
- Cash in hand
- Cash reserve ratio
- Cashew nut
- Cashier
- Cashierment
- Cask
- Cassation court
- Cassava
- Cassette
- Cast a lurid light on
- Cast a shadow
- Cast down
- Casuistical
- Casus belli
- Cat and mouse game
- Cat call
- Cat fish
- Cat has nine lives
- Cataclysm
- Catafalque
- Catalysis
- Catamaran
- Catch
- Catch a tartar
- Cattamaran
- Cattle lifting
- Cattle plague
- Cattle rearing
- Cattle show
- Cattle-shed
- Cauda draconis
- Caudex
- Caulk
- Causationism
- Cause and effect
- Cause celebre
- Causeless
- Causerie
- Cemeteries
- Censor
- Censure
- Centaur
- Centimetre
- Central meridian
- Central position
- Central spot
- Certificated
- Certify
- Certiorari
- Cesspool
- Cestus
- Cetacea
- Ceylon
- Chafe
- Chaffer
- Chagrin
- Chain reactor
- Chairman
- Chairperson
- Chairwoman
- Change for
- Change of clothes
- Change of pace
- Change of scene
- Change over
- Change the face
- Changefulness
- Changeless
- Changeling
- Changing
- Channel
- Chant
- Chaotic
- Chauvinism
- Che guvera
- Cheapen
- Cheapskate
- Cheating
- Check into
- Checked
- Cheeks
- Cheer up
- Cherry brandy
- Cherry pie
- Cherub
- Chest
- Chesty