- cruise liner
- collared pika
- common basil
- cephalopod
- cephalopod mollusk
- congenital defect
- congenital disorder
- congenital anomaly
- convictfish
- convict fish
- crazy weed
- crazyweed
- cercosporella
- cereal bowl
- comes to ears
- comfort food
- culture medium
- chyme
- citizens committee
- committee for state security
- commissioning
- certification
- commission agent
- commission on narcotic drugs
- cunner
- cavy
- cotton rat
- chinchilla
- capibara
- chinchillon
- Chinchilla laniger
- coypu
- circuit board
- circle round
- circumnavigate
- circumambulate
- circle around
- circis siliquastrum
- circle officer
- cloth covering
- computer mouse
- cardigan
- cardiac tamponade
- Chinese chequers
- Chinese checkers
- chess
- chess game
- chiropteran
- congenital afibrinogenemia
- congenital megacolon