- Child
- Child prodigy
- Child safety lock
- Childishness
- 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
- Civilised
- Claimed
- Clairaudience
- Clam up
- Clammy
- Clamor
- Clamour
- Clamp down on
- Clap of thunder
- Clay
- Clean down
- Clean from
- Clean hands
- Clean-handed
- Clean-shaven
- Cleanliness
- Cleanness
- 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
- Coat of arms