- Curlew
- Curly
- Curmudgeon
- Currency note
- Custard
- Custom
- Custom-built
- Cutover
- Customer
- Customs house
- Cut a wide swath
- Cut and paste
- Cut loose
- Cyclorama
- Cyclosis
- Cygnet
- Cymbidium
- Cynical
- Cynosure
- Cypress
- Cyst
- C
- Chadors
- Characterised
- Circumcentre
- Coaly
- Cognovit
- Comose
- Conjunctive
- Campari liquor
- Camphor-scented
- Campus
- Campylobacter
- Can
- Canary
- Cancatervate
- Candescence
- Candid
- Capacitate
- Cantilever
- Canvas shoes
- Canvass
- Capability
- Capacious
- Capaciousness
- Capacity
- Cape
- Capitalist
- Capitalization
- Capitalize
- Capitation
- Capitulate
- Capitulation
- Carassing
- Caravan
- Carboniferous
- Cardamom tea
- Cardboard
- Cardinal
- Cardiograph
- Carouse
- Carpe diem
- Carpenter
- Carpenter's
- Carpet weaver
- Carpets
- Carpool
- Carriagable
- Cartoon
- Carriage paid
- Carrot and stick policy
- Carry it off well
- Carry all before
- Carry away
- Carry back
- Cash book
- Cash payment
- Cashew-fruit
- Cashmere
- Casino
- Cassia fistula
- Cassock
- Cassuarina tree
- Cast a spell on
- Cast iron, cast metal
- Cast light on
- Casuarina tree
- Casuist
- Catabolism
- Catalog
- Cataloguing
- Catalyse
- Catapult
- Catastrophic
- Catatonic
- Catch cold
- Causing heat
- Causing joy and fear
- Caustic potash
- Caution money