- Chithrini
- Chitty foreman
- Chivalry
- Chivvy
- Chivy
- Chloroform
- chock-a-block
- Choke
- Choke damp
- Choker
- Chrysanthemum
- Chrysanthus
- Chubby
- Chukle
- Chump
- Chunk
- Churlishness
- Churn
- Churned
- Churning rod
- Cited
- Citizen of the world
- Citizenship
- Citrine
- Citronella
- City chief
- City of indra
- City-dweller
- Civic centre
- Civil disobedience
- Civil war
- Clash of interests
- Class conscious
- Class-war
- Classic
- Classical
- Classical antiquity
- Classified
- Clatter
- Clause
- Claustrophobic
- Clavicle
- Clearance sale
- Clearness
- Cleft lip
- Clement
- Cleromancy
- Clever feat
- Clink
- Clip
- Clippers
- Clipping
- Clitoria
- Cloakroom
- Clockwork
- Clod
- Clod hopper
- Cloister
- Clop
- Close around
- Close down
- Clouds
- Clove
- Cloven
- Clownish
- Cloze test
- Club
- Cluck
- Clueless
- Clumsily
- Clumsy
- Clunker
- Clutter
- Coals
- Coals to new castle
- Coast
- Coat of arms
- Coated
- Coattails effect
- Cobalt bomb
- Cobble
- Cobbler
- Cobol
- Cobra
- Cocaine
- Cock
- Codex
- Codger
- Coed
- Coefficient
- Coessential
- Coffee break
- Coffee plant
- Coffer
- Cogitate
- Cogitation
- Cogitative
- Cognate
- Cognisance
- Cold storage