- chess master
- congenital afibrinogenaemia
- congenital myopathy
- congenital laryngeal web
- chondroectodermal dysplasia
- chondrodystrophia
- congenital paramyotomia
- congenital palate insufficiency
- chylocele
- conger
- clupea harengus harengus
- conciliatory
- conchologist
- collector of internal revenue
- child minder
- chapfallen
- congratulatory
- cultural
- cowskin
- cowtown
- cembra nut
- colic loop
- chafing
- chippy
- causal factor
- clamshell
- colbert butter
- codein
- causing grief
- causing agony
- Camberwell beauty
- comma butterfly
- chrysanthemum coronarium
- Christmas begonia
- cubistic
- common lynx
- Canada lynx
- catamountain
- coue
- crossing guard
- conjunctival layer of eyelids
- chum salmon
- chula vista
- cobber
- cronus
- chess move
- castling
- cryobiology
- canal zone
- capital of panama