- Corrosion
- Corrugated iron
- Corsair
- Coruscate
- Corvette
- Cosmetic
- Cosmic rays
- Cosmogony
- Cosmopolitan
- Cosmopolite
- Cosset
- Cost
- Council-chamber
- Counsel
- Counselled
- Count noses
- Countenance
- Counter
- Counter band goods
- Counter charge
- Counter check
- Counter march
- Counter-attraction
- County court
- County town
- Coupe
- Coupe de etat
- Couplate
- Coupon
- Courageously
- Course
- Courser
- Court fool
- Courteous
- Courtesy
- Courtship
- Courtyard
- Cove
- Cowling
- Cowpie
- Cowrie
- Cows urine
- Cowslip
- Cox
- Coz
- Cozen
- Cracker
- Crackle
- Cracksman
- Creep
- Creeper cynanchum acidum
- Crepitate
- Cricket
- Cried
- Crier
- Crime passionnel
- Croissant
- Crony capitalism
- Cronyism
- Crook
- Crookedly
- Crop up
- Cross breeds
- Cross examination
- Cross examine
- Cross pollination
- Cross road
- Cross-beam
- Cross-bred
- Crow
- Crow about
- Crow pheasant
- Crowbar
- Crowd
- Crowded
- Crown
- Crows
- Crows bath
- Crozier
- Crt
- Crucial
- Crude sugar
- Crudely
- Crudeness
- Cruel person
- Cruel woman
- Cry over spilt milk
- Crying over spilt milk
- Cryogenic
- Cryptic
- Crypto graphed
- Crystal clear
- Crystal-gazing
- Crystallise
- Cu
- Cubic measure
- Cubism
- Culture shock
- Cum
- Cumulate