- 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
- Catechism
- Categorize
- Category
- Catenary
- Cater to
- Caterer
- Caterwaul
- Catnap
- Causing heat
- Causing joy and fear
- Caustic potash
- Caution money
- Cautionary
- Cautiously
- Cavalcade
- Cavalryman
- Cave dweller
- Cave painting
- Caveat
- Cavort
- Cavum
- Centrifugal machine
- Centriole
- Centurion
- Ceramics
- Ceramography
- Cerbera odollam fruit
- Cerebrum
- Ceremonious
- Certainty
- Chakras
- Chalazion
- Challan
- Challenge
- Chamber of commerce
- Chamber of horrors
- Champagne
- Chancel
- Chatty
- Charlatan
- Charon
- Charvaka doctrine
- Charybdis
- Chasmogamic
- Chat
- Chateau
- Chauffer
- Cheering
- Cheerio
- Cheetah
- Chemical
- Chemical inputs
- Chemical warfare
- Chemicals
- Chemise
- Chemistry
- Chequer
- Cherishing
- Chermatic economics
- Cherry
- Chief mahout
- Chief of the family
- Chief person
- Chief secretary
- Chief whip
- Chignon
- Chihuahua
- Childbirth
- Childless
- Chiropractor
- Chiseler
- Chiselling
- Chitty
- Chloride
- Choice
- Choke off
- Christian era
- Christian name
- Christmas eve
- Christmas tree
- Chromoplast
- Chronic disease
- Chronological
- Cicada
- Cider-press