- caboose
- cackle
- cacogenics
- child
- cabriolet
- car
- cryptic
- cabbage
- cabby
- cacoethes
- cad
- cadet
- cadmium
- cadmium cell
- cadre
- caecum
- caesium clock
- cotton
- corduroy
- cream
- club
- cabinet minister
- cable length
- cachet
- cachexia
- cacography
- cadaver
- caddish
- cadence
- cafe
- caffeinism
- cager
- cactus
- cadaverous
- caenolestes
- cairn
- caisson
- cajole
- cake
- calamine
- calamity
- calcination
- calcium stearate
- calendar month
- calendar year
- calf
- caliber
- calibrated
- caliche
- calibration