- chemical hazards
- chemical warfare
- chequered cloth
- chernozem
- chilean gurilla leader
- chilled water
- chimera
- chimney
- choice
- chooser
- chop
- christo
- chromium
- chronic
- chronis
- chronological
- chrysophilist
- chukle
- circumnavigation
- circumscribe
- circumstances
- circumstantial evidence
- citation
- cite
- citified
- citron
- clammy
- clamorous
- clampdown
- clan
- clandestine marriage
- clapper
- claw
- clax of brass
- clay cart
- clean-cut
- clean-shaved head
- cleanse
- clergyman, clergywoman
- clerical
- clever feat
- cleverness
- clich
- clitoria
- cloaca
- clod
- closet
- clot
- clot buster
- cloth
- clothes
- co-brother
- co-dining
- co-respondent
- coal tar
- coalesce
- cockade
- cockatoo
- cocksure
- coconut
- coconut tree
- cogent
- cognition
- cognizance
- cohort
- collective farm
- collectorate
- collide
- colloquial usage
- collusiveness
- colonisation
- colonise
- coloquial
- colorful
- colour brine
- colour line
- colourless
- colporteur
- come into or enter one's head
- come short of
- come thick and fast
- come to
- come to a head
- come to grips with, get to grips with
- come to terms
- comforting
- comfortless
- coming to blows
- command
- common cold
- common ground
- comose
- compete
- competent for
- competitive
- compile duration
- complacency
- condom
- condor
- conducive