- closure segment
- closute dam
- cloth filter
- cloth partition
- cloth roof
- cloth shrinkage
- clothe
- clothes dryer
- clothes line
- clothoid
- clothoidal curve
- clotting
- cloudy weather
- clough
- clout
- clout nail
- cloverleaf interchange
- clown
- club
- club hammer
- club zone
- clubhouse
- clump
- cluster activity
- clutch
- clutch dish
- clutch ring
- cluttered column
- coach
- coach screw
- coach yard
- coagulability
- coagulation
- coagulation basin
- coagulation tank
- coagulator
- coal barge
- coal crusher
- coal firing
- coal handling
- coal oil
- coal pump
- coal seam
- coal tar
- coal washer
- coal washery
- coaling
- coaling crane
- coaling lighter
- coaling siding
- coaling station
- coarse aggregate
- coarse cement
- coarse concrete
- coarse grain
- coarse gravel
- coarse lattice
- coarse material
- coarse pearlite
- coarse sand
- coarse sizing
- coarse-grained
- coarseness
- coast
- coast dune
- coast protection
- coastal
- coastal canal
- coastal city
- coastal dune
- coastal engineer
- coastal plain
- coastal sand
- coastal storehouse
- coastal zone
- coasted electrode
- coasting bar
- coasting box
- coastwise
- coat nail
- coated
- coated bar
- coated electrode
- coated macadam
- coated nail
- coated paper
- coating material
- coating scaling
- coating varnish
- coaxial cable
- coaxial line
- cob
- cob brick
- cob work
- cobblestone masonry
- cobblestone pavement
- climatic resort
- climatic subregion
- climatotherapeutic ground
- climbing lane