- coffeepot
- coffee-table book
- coffers
- coffin
- cog
- cogent
- cogitate
- cognac
- cognitive
- cogwheel
- cohabit
- coherent
- coherently
- cohesion
- cohesive
- cohort
- COHSE
- COI
- coil
- coiled
- coin
- coinage
- coin-box
- coincide
- coincidence
- coincidental
- coincidentally
- coin-operated
- coitus
- coke
- Coke®
- Col.
- cola
- COLA
- colander
- cold
- cold cream
- cold cuts
- cold feet
- cold shoulder
- cold sore
- cold storage
- cold sweat
- Cold War
- cold-blooded
- cold-hearted
- coldly
- coldness
- coleslaw
- colic
- collaborate
- collaboration
- collaborative
- collaborator
- collage
- collagen
- collapse
- collapsible
- collar
- collarbone
- collate
- collateral
- collation
- colleague
- collect
- collectable
- collected
- collecting
- collecting tin
- collection
- collective
- collective bargaining
- collective ownership
- collectively
- collector
- collector's item
- college
- college of education
- collide
- collie
- colliery
- collision
- collision damage waiver
- colloquial
- collude
- collusion
- cologne
- Colombia
- Colombian
- Colombo
- colon
- colonel
- colonial
- colonialism
- colonist
- colonize
- colonnade
- colony
- color etc.
- Colorado
- Colorado beetle
- colossal
- colostomy
- colour
- colour bar
- colour scheme
- colour supplement
- colour-blind
- colour-coded
- coloured
- colourfast
- colourful
- colouring
- colourless
- colt
- column
- columnist
- coma
- comatose
- comb
- combat
- combative
- combination
- combination lock
- combine
- combine harvester
- combined
- combustible
- combustion
- come
- comeback
- Comecon
- comedian
- comedienne
- comedown
- comedy
- comely
- come-on
- comet
- come-uppance
- comfort
- comfort station
- comfortable
- comfortably
- comforter
- comforting
- comfy
- comic
- comic strip
- comical
- coming
- comma
- command
- command module
- command performance
- commandant
- commandeer
- commander
- commander in chief
- commanding
- commanding officer
- commandment
- commando
- commemorate
- commemoration
- commemorative
- commence
- commencement
- commend
- commendable
- commendation
- commensurate
- comment
- commentary
- commentate
- commentator
- commerce
- commercial
- commercial bank
- commercial break
- commercial college
- commercial television
- commercial traveller
- commercial vehicle
- commercialism
- commercialize
- commercialized
- commercially
- commie
- commiserate
- commiseration
- commission
- Commission for Racial Equality
- commissionaire
- commissioned officer
- commissioner
- commit
- commitment
- committed
- committee