- clinic
- clinician
- clinker
- clinker block
- clinker cement
- clinker concrete
- clinker crusher
- clinkstone
- clipart
- clipboard
- clipsheet
- cloak-room
- clock generator
- clock rate
- clod
- clod body
- close boarding
- close string
- close tank
- close valve
- close workbook
- close-grained
- closed abutment
- closed branching
- closed building
- closed circuit
- closed container
- closed door
- closed drainage
- closed eaves
- closed frame
- closed profile
- closed stair
- closed surface
- closed system
- closed traverse
- closeness
- closet frame
- closing
- closing documents
- closing error
- closing segment
- closing stile
- closing windows
- cocking
- coconut fiber
- cocoon drier
- coddle
- code
- code alphabet
- code block
- code message
- code parameters
- code program
- code signal
- code size
- code translation
- code word
- codify
- coding
- coding device
- coding sheet
- coffer ketxon
- cofferdam piling
- coffered foundation
- coffering
- cog
- cogged joint
- cogging
- cohere
- coherent
- cohesion moisture
- cohesion pressure
- coiled tube
- coin
- coincidence effect
- coke residue
- cold bending
- cold brittleness
- cold concreting
- cold cure
- cold curing
- cold endurance
- cold floor
- cold lagoon
- cold mix
- cold mixed
- cold paste
- cold pressing
- cold riveting
- cold type
- cold wave
- collapse branch
- collapsible beam
- collapsible formwork
- collapsible partition
- collecting conveyor
- collecting drain
- collecting gutter
- collection