- cardiomegaly
- clubbing
- crepitation rale
- compact cell
- comp
- compact style
- compact bone
- concordat
- compact language
- cow pen
- cattle pen
- cascabel
- cascade merge
- cascade down
- cooperstown
- coordinate addressed memory
- coordinate data
- coordinate calipers
- compart
- coordinate clause
- catenary series
- cosmic string
- cowardliness
- chainlike
- click open
- chosen people
- citizen genet
- collocate
- corn earworm
- corn cockle
- corn cake
- corn tash
- cornpone
- corn whisky
- cheatgrass
- contradistinguish
- coronate
- c. w. post
- charles william post
- councilorship
- controllership
- cadetship
- counsellorship
- captaincy
- comptrollership
- chancellorship
- captainship
- custodianship
- cardinalship
- chieftaincy