- Capital outlay
- Capital punishment
- Capitalism
- Capitol
- Capriccio
- Caprice
- Capsicum
- Capsize
- Capstan
- Captcha
- Captious
- Caput draconis
- Capybara
- Carabineer
- Carafe
- Carambola
- Caramel
- Careerist
- Caret
- Careya arborea
- Cargo
- Caricaturist
- Caries
- Caring
- Carry off
- Carry or take can
- Carry out
- Cart-pullers
- Carte blanche
- Carton
- Caruncle
- Carvat
- Carve out
- Caryatid
- Case
- Cast off
- Cast pearls before swine
- Cast-away skin of snake
- Casteism
- Caster of metals
- Castigate
- Castillian
- Catalist
- Castor-oil-plant
- Casty away
- Casuality
- Casualty
- Casualty ward
- Casuistry
- Cat
- Cat and dog life
- Cat out of the bag
- Cataclism
- Catalyst
- Catalytic
- Cataplexy
- Cataract
- Catch a chill
- Catch a few rays
- Catch able
- Catch at a straw
- Caul
- Causality
- Cause
- Causing fear
- Cdc
- Cedar
- Cedar tree
- Cede
- Cedent
- Ceiling fan
- Celebrated
- Celerations
- Celibate
- Cell
- Cell a spade a spade
- Cellular
- Centralism
- Centrally
- Centrally placed
- Centre of gravity
- Centre of mass
- Centrifugal force
- Centroid
- Ceramic
- Cerebellum
- Cerebral
- Ceremonial
- Ceremonies
- Ceremoniously
- Cerulean
- Cervix
- Cess
- Cfd
- Chaff
- Chain reaction
- Chair
- Chaise
- Chandlery
- Change gears