- Christmas cactus
- cadaveric
- clay
- cremains
- caseworm
- cadency
- cecal
- cecum
- cenogenesis
- cespitose
- coffee
- coffee shop
- caff
- coffeehouse
- coffee bar
- cybercafe
- coffee royal
- coop
- count alessandro di cagliostro
- crocodilian
- connivance
- collusion
- crocodilian reptile
- cayman
- chrysophyllum oliviforme
- chrysophyllum cainito
- capital of egypt
- cofferdam
- chest
- chamber
- chait
- cur
- catjang pea
- coaxingly
- calophyllum calaba
- crescentia cujete
- cucurbita foetidissima
- caladium
- caladenia
- clinopodium grandiflorum
- calamint
- common calamint
- comedy
- chalcedony
- chrysoprase
- carnelian
- california wine
- california yellow bells
- californian
- calisaya