- Cortisol
- Cosmetic powder
- Cosmonaut
- Cosmopolitanism
- Councillor
- Counsellor
- Counselors
- Count
- Count on
- Count out
- Counter mine
- Counter move
- Counter plot
- Counter revolution
- Counter-argument
- Counter-productive
- Counteract
- Counteraction
- Counterculture
- Counterfoil
- Countermeasure
- Counterpoint
- Country
- Country-made
- Countryman
- Countryside
- County clerk
- County council
- Coverlet
- Covert
- Covertures
- Covetously
- Cow
- Cow lick
- Cow sacrifice
- Cow-dung beetle
- Cow-herd-woman
- Cowardly
- Cowherds
- Cowhide
- Cowry
- Cows milk
- Cowshed
- Coxcomb
- Coyly
- Coyote
- Crab-apple
- Crabbed
- Crack up
- Crackdown
- Cracking
- Cracking of finger joints
- Crackpot
- Cradle
- Creak
- Creaking noise
- Creaky
- Creater
- Creational
- Creatively
- Creature
- Credentials
- Credibility
- Credible
- Credulously
- Creed
- Creeping
- Cremate
- Crematory
- Crenellated
- Creosote
- Crescent
- Cress
- Cretinism
- Crew
- Cribbage
- Crick
- Crooked
- Crop circle
- Croquis
- Crore
- Cross breed
- Cross eye
- Cross the rubicon
- Cross-border
- Cross-check
- Cross-grained
- Cross-stitch
- Crossbar
- Crossbow
- Crossing
- Crotchet
- Croup
- Croupier
- Cruise control
- Crunk
- Crusade
- Crusader
- Crush
- Crushing