- colour density
- colour grader
- colour index
- colour sample
- colour scheme
- colour strength
- colour supplement
- colour tablet
- coloured spots
- colourity
- columnar book
- columnar journal
- columnar record
- columnar system
- comb
- combative advertising
- comber
- combination order
- combination policy
- combination rate
- combination sale
- combination1
- combined policy
- combined rate
- combined tariff
- combined transport
- combustion
- combustion heat
- Comecon
- comfort letter
- command economies
- Command economy
- cold plate
- cold predefecation
- cold room
- cold storage
- cold turkey
- cold-stored
- colderman
- collaborative venture
- collagen tissue
- collapse
- collapsible box
- collapsible container
- collard
- collateral
- collateral agreement
- collateral assignment
- collateral loan
- collateral note
- collateral services
- collating report
- collect
- collect freight
- collectible
- collecting agency
- collecting bill
- collecting charges
- collecting commission
- collecting department
- collecting note
- collecting trade
- collection agency
- collection charges
- collection cost
- collection period
- collection post
- collection schedule
- collection services
- collective commerce
- collective farm
- Collective goods
- collective interests
- collective property
- collectivist
- Collinearity
- collision oligopoly
- collusive duopoly
- Colombian
- colonial economy
- colonial problem
- color proof
- color separation
- Colorado claro
- colour harmony
- colour sorter
- colour standard
- colour test
- colouring agent
- colouring substance
- column
- column still
- comb honey
- combination bond
- combination cooler
- colorator
- colorimetric study
- colostrum
- colour advertising
- colour filter