- Closely
- Closely related
- Closeness
- Closet
- Closure motion
- Clothe
- Cloud
- Cml
- Co-belligerent
- Co-dining
- Co-owner
- Co-traveller
- Coadjutor
- Coagulated
- Coagulation
- Coal
- Coal gas
- Coalescence
- Coalface
- Coalite
- Cock-a-hoop
- Cock-crest
- Cockatoo
- Cockerel
- Cockernony
- Cockle
- Cocky
- Cocoa
- Coconut leaves
- Coconut oil
- Coconut palm
- Coconut toddy
- Cod
- Coddiwomple
- Coherence
- Coherent
- Coherently
- Cohesion
- Coiffure
- Coinage
- Coincide
- Coincidence
- Coincidental
- Coir fibre
- Coital
- Coitus
- Colander
- Cold
- Cold comfort
- Collectible
- Collecting
- Collection of a part of produce as tax
- Collective
- Collectivize
- Collegial
- Collide
- Collie
- Collinear
- Colloquial usage
- Colloquy
- Collywobbles
- Colonitis
- Colony
- Colorful
- Colors
- Colossal
- Colostrums
- Colour box
- Colourist
- Colours
- Column
- Columnar
- Com
- Com and go
- Come into force
- Come on
- Come thick and fast
- Come to aid
- Come to an end
- Come to blows
- Come to life
- Come to light
- Come to terms
- Come to the front
- Come under the hammer
- Comeuppance
- Comfit
- Comfort
- Comfortably
- Comforter
- Comforting
- Coming from south
- Commissar
- Commit
- Commit to memory
- Commited
- Commodious
- Commodities
- Commoditisation
- Common law