- Courteous
- Courtesy
- Courtship
- Courtyard
- Cove
- Crafty
- Crane
- Cranefly
- Cranium
- Crash landing
- Crassness
- Crawl
- Criminally
- Crimson
- Cringe
- Crinkle
- Crisp
- Crispation
- Critical decision
- Criticism
- Criticize
- Critique
- Crochet
- Crock up
- Crocodile
- Cross-current
- Cross-face
- Cross-hatch
- Cross-legged
- Cross-polination
- Cross-pollinate
- Cross-reference
- Crossover
- Crosspiece
- Crosswalk
- Crotched
- Crouch
- 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
- Cuneiform writing
- Cuneus
- Cunnilingus
- Cunningly silent person
- Cupidity
- Cupola
- Curriculam veta
- Curriculum vitae
- Curry favour
- Curry leaves
- Curry powder
- Cursed
- Curtain
- Curtain lecture
- Curtness
- Curvated
- Cyclopean eye
- Cylinder
- Cylindrical steamed rice cake
- Cynic
- Cynicism
- Cryptography
- Cryptology
- Crysanthus
- Cyclostyle
- Concuss
- Cogency
- Cabin
- Cabin cruiser
- Cable
- Caboodle
- Cache memory
- Cachet
- Cachinnation
- Cadaver
- Cadd
- Cadet
- Cadet corps
- Cadillac
- Cadre
- Cae
- Caesarean operation
- Caffeine
- Cafune
- Cagey
- Calibre
- Calico
- Caliph
- Caliphate