- chairmanship
- councillorship
- consulship
- curatorship
- chaplainship
- commandery
- clerkship
- contraindicate
- crowding
- computing machine
- cps
- crime rate
- charge per unit
- correlativity
- cocainize
- cocainise
- consciousness_altering drug
- cross oneself
- confute
- clock time
- coffeepot
- closed corporation
- closely held corporation
- close corporation
- cooking pan
- chafing dish
- corsage
- craw
- corn campion
- corn spurry
- cockle_bur
- cockle_burr
- cockleburr
- Canadian fleabane
- crown_of_the_field
- carpetweed
- cultivated plant
- corn spurrey
- Cannabis indica
- cannabinone
- cast down
- copyedit
- copyread
- covered option
- couch commerce
- classifier
- cognate word
- clock up
- cheapen
- chagrined