- Cosmic rays
- Cosmogony
- Cosmopolitan
- Cosmopolite
- Cosset
- Cost
- Counter-temps
- Counterbalance
- Countess
- Country-greens
- Cover up
- Cover-cloth bed
- Covered
- Covering letter
- Covert room
- Covertly
- Covet
- Covetable
- Covey
- Cow-elephant
- Cow-herd's
- Cow-pat
- Cowed
- Cower
- Cowhouse
- Crafty
- Crane
- Cranefly
- Cranium
- Crash landing
- Crassness
- Crawl
- 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
- Cruet
- Cruft
- Cruise
- Crumb
- Crumble
- Crunchy
- Crushes
- Crusty
- Crwth
- Cry for
- Cry foul
- Cry ones heart or eyes out
- Cuckoo
- Cuckoo clock
- Cuddle
- Cuffed
- Cuisine
- Culinary
- Cullet
- Culottes
- Culpable
- Cultivation
- Cultivator
- Culttered
- Cupreous
- Curable
- Curator
- Curdle
- Curiousness
- Curly hair
- Currency