- chlamyphore
 - chlamyphorus truncatus
 - common foxglove
 - cock_and_bull story
 - calypso bulbosa
 - calypso
 - church
 - Church of Scientology
 - Christian church
 - congregation
 - common salt
 - condensate
 - charles frederick worth
 - clofibrate
 - Carafate
 - cold medicine
 - cathartic
 - clopidogrel bisulfate
 - counterirritant
 - carminative
 - coin it
 - coin bank
 - coin money
 - catmint
 - common unicorn plant
 - costusroot
 - camphor dune tansy
 - Cichorium intybus
 - common devil's claw
 - cumin
 - cilantro
 - Carthamus tinctorius
 - climbing onion
 - coreopsis
 - Celosia argentea cristata
 - clammy chickweed
 - cumfrey
 - Catharanthus roseus
 - chamois cress
 - chicory
 - coolwart
 - cat's feet
 - corn salad
 - Coriandrum sativum
 - Cichorium endivia
 - cultivated carrot
 - coriander
 - cow parsley
 - clover
 - cow parsnip