- Counseller
- Counselling
- Countdown
- Counter plea
- Counter-acting
- Coup de grace
- Couple
- Courses
- Court of law
- Courtesies
- Courtliness
- Courtly
- Cowl
- Cowpea pods
- Cows
- Coxswain
- Coy
- Crab
- Crabber
- Crack a joke
- Crack brained
- Cracked
- Cracking sound
- Craftiness
- Crazy
- Crc
- Creamy
- Create
- Creche
- Credence
- Credit
- Criminology
- Crimp
- Crinkly
- Cripple
- Crispbread
- Critic
- Criticise
- Crock
- Crockery
- Crocodile tears
- Cross-dressing
- Cross-hands
- Cross-ply
- Crossness
- Crosswise
- Crotch
- Croton plant
- Crypt
- Crystalize
- Crystallisation
- Crystallization
- Cs
- Ct
- Cubbish
- Cube root
- Cubic
- Cubic contents
- Cubic foot
- Cuboid
- Cultural village
- Culvert
- Cumbersome
- Cummerbund
- Cumulus
- Cupid
- Cupids
- Cupids bow
- Cupping process
- Curative
- Curbable
- Curcumin
- Curdy
- Curer
- Curing
- Curing off
- Curio
- Curiously
- Curled
- Curler
- Curlew
- Curly
- Curmudgeon
- Currency note
- Custard
- Custom
- Custom-built
- Cutover
- Customer
- Customs house
- Cut a wide swath
- Cut and paste
- Cut loose
- Cyclorama
- Cyclosis
- Cygnet
- Cymbidium
- Cynical
- Cynosure
- Cypress