- Catholic Church
- cottonwood
- cricket frog
- cornus florida
- common white dogwood
- cornel
- cat squirrel
- colubrid snake
- canadian hemlock
- colubrid
- civil time
- chagatai
- comfortable
- clear sailing
- cushy
- chafe
- chophouse
- consumption
- coprophagy
- coprophagia
- cooking apple
- Cortland
- corrasion
- chow
- carcinomatous myopathy
- cologne water
- cologne
- caoutchouc
- code
- computer code
- crackpot
- concentricity
- cleric
- church calendar
- canon law
- church mode
- capsule
- calyculus
- calycle
- cilium
- cecity
- cringle
- cornell
- cubic yard
- capacity measure
- cubic content unit
- cubic measure
- capacity unit
- cubage unit
- cubature unit