- Cagey
- Cain
- Calaboose
- Calamari
- Calcareous
- Calcification
- Calcium
- Calefaction
- Calendar
- Calendar month
- Caliber
- Callus
- Calm down
- Calm man
- Calmly
- Calmness
- Caloric
- Calotropis
- Camber
- Camels
- Cameo
- Camera-man
- Camisole
- Camouflage
- Camp chair
- Camp-shed
- Camper
- Campesinos
- Campment
- Canaille
- Canarese
- Cancer
- Cancroids
- Candidly
- Candidness
- Candor
- Candour
- Canine
- Canticle
- Canto
- Canton
- Canvasser
- Canyon
- Cap
- Cap in hand
- Caparison
- Capitalistic
- Caraway
- Carbide
- Carbohydrate
- Carbolic
- Carbon
- Carbon dioxide
- Carbonic
- Carboy
- Carburettor
- Cpm
- Card game
- Card table
- Cardigan
- Carnivorous
- Carom seed
- Carotids
- Carousel
- Carp
- Carpenter bee
- Carpenters son
- Carpetbagger
- Carriage
- Carriage and pair
- Carriage forward
- Carrot
- Case law
- Case sensitive
- Casement
- Cash
- Cash in hand
- Cash reserve ratio
- Cashew nut
- Cashier
- Cashierment
- Cask
- Cassation court
- Cassava
- Cassette
- Cast a lurid light on
- Cast a shadow
- Cast down
- Casuistical
- Casus belli
- Cat and mouse game
- Cat call
- Cat fish
- Cat has nine lives
- Cataclysm
- Catafalque
- Catalysis
- Catamaran
- Catch
- Catch a tartar