- Childline
- Children
- Chirrup
- Chit
- Chithrini
- Chitty foreman
- Chivalry
- Chivvy
- Chivy
- Chloroform
- chock-a-block
- Choke
- Choke damp
- Choker
- Christendom
- Christhood
- Christian science
- Christianise
- Christianity
- Christians
- Christmas rose
- Christo
- Chromaticity
- Chromatics
- Chromosome
- Chronic
- Chronograph
- Chronologic
- Chrysanthemum
- Chrysanthus
- Chubby
- Chukle
- Chump
- Chunk
- Churlishness
- Churn
- Churned
- Churning rod
- Circuit
- Circulation
- Circumference
- Circumrotation
- 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
- Cleverness
- Cliff
- Climbers
- Climbing plant
- Climbing stem
- Clinging
- Clinging steadfastedly on
- Clinical psychology
- 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