C
- crackpot
- countrified
- condominium
- concinnity
- con
- comeuppance
- clangor
- chutzpah
- choosy
- chipper
- chestnut
- chaffing
- cut down
- crouch
- curio hunter
- critical point
- crew modules
- craft of poetry
- count on
- credit sb. with sth.
- correspond to
- cope with
- convex polygon
- convection zone
- convection current
- contrast with
- contrary to
- course offering
- continental drift
- continental shelf