- Clarion
- Clasp
- Classical music
- Classical work
- Classify
- Classifying
- Classless
- Classmate
- Classy
- Clavichord
- Cmc
- Clearance
- Clearing house
- Cleave
- Clef
- Cleft palate
- Clematis
- Clerical
- Clerk
- Clever fellow
- Clever man
- Cleverish
- Cleverly
- Cliche
- Cliche-ridden
- Cliched
- Click
- Client
- Cliff-hanger
- Climatic
- Climatics
- Climax
- Climb
- Climbable
- Climbing
- Cline
- Clinic
- Clinical thermometer
- Close up
- Close-set
- Closing date
- Clot buster
- Cloth
- Cloth for onam
- Cloudburst
- Cloudy
- Cloudy sky
- Clough
- Cloy
- Clue
- Clumpy
- Clunk
- Cluster of lotus flower
- Cluster of desoms
- Clutch
- Clutter up
- Clyster
- Coalmine
- Coarse sand
- Coarsen
- Coarseness
- Coast of coromandal
- Coastal
- Coaster
- Coastline
- Cobbler-smith
- Coca cola
- Coccinia grandis
- Coccyx
- Cochin
- Cock crow
- Cock of the walk
- Cock-up
- Cockroach
- Coconut husk
- Coconut scrapes
- Cocoon
- Cod fish
- Codasyl
- Code of conduct
- Codec
- Cognoscenti
- Cohere
- Cohesive
- Cohesiveness
- Coiffeur
- Coincident
- Coincidentally
- Coir carpet
- Coition
- Coke
- Cola
- Cold season
- Cold shoulder
- Cold sore
- Coldly
- Coldness
- Colic
- Collaborator
- Collagen