- Chronology
- Cicartix
- Cicatrize
- Cicer arictinum
- Cider
- Cinchona
- Cinematograph
- Cinerama
- Cineraria
- Cinnamon
- Cinnamon powder
- Cir
- Circe
- Citified
- Citizen
- Citrus
- City-gate
- Civet cat
- Civet-musk
- Civic
- Civics
- Civil behaviour
- Civil defence
- Civil liberty
- Civil servant
- Civilisation
- Clabber
- Clack
- Cladding
- Clairvoyance
- Clairvoyant
- Clamant
- Clamber
- Clamorous
- Clamp
- Clamp down
- Clan
- Clan-chief
- Clancining
- Clangourous
- Clap
- Claptrap
- Clay modelling
- Clean
- Clean out
- Cleaner
- Cleaning
- Cleansed
- Clear away
- Clear data
- Clear out
- Clear the place
- Clear the way
- Clear up
- Clientele
- Cliffhanging
- Climactic
- Climate
- Climate change
- Climatology
- Climbing hoop
- Clime
- Climp up
- Clinging steadfast
- Clinging to
- Clingy
- Clinical
- Close rank
- Close round
- Close to
- Close-fitting
- Closed place
- Closefisted
- Closely built
- Closet genius
- Closing as flowers
- Clot
- Cloth purse
- Clothline
- Cncoction
- Co-axial
- Coarse
- Co-factor
- Co-operator
- Co-sister
- Coachman
- Coagulant
- Coal bed
- Coal tar
- Cock fighting
- Cock-eyed
- Cockade
- Cockle shell
- Cockney
- Cockpit
- Coconut inflorescence
- Coconut milk
- Coconut tree
- Cocoonery
- Coda