- Constipate
- Constipation
- Constitution
- Constitutional
- Constraint
- Constriction
- Construction
- Constructive thinking
- Consuetude
- Consul
- Consular
- Contemplation
- Contemplativeness
- Contemporaneity
- Contemporaneous
- Contemptuous
- Content
- Contest
- Contiguous
- Continent
- Contrary to vedas or scriptures
- Contributing
- Contribution
- Contrition
- Contrivable
- Contriver
- Control tower
- Controllable
- Controlling
- Controvert
- Conunction
- Conundrum
- Cooling
- Coolly
- Coon
- Coop
- Cooperation
- Cooperative
- Coordinated
- Coordinator
- Copacetic
- Copasetic
- Copper
- Copper coin
- Copper-coloured
- Coppice
- Corn circle
- Corn factor
- Corn-cob
- Cornice
- Coromandal coast
- Coronary arteries
- Corrosion
- Corrugated iron
- Corsair
- Coruscate
- Corvette
- Cosmetic
- 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
- Criminally
- Crimson
- Cringe