COVETISE, avarice.
COWSHARD, cow dung.
COXCOMB, fool's cap, fool.
COY, shrink; disdain.
COYSTREL, low varlet.
COZEN, cheat.
CRACK, lively young rogue, wag.
CRACK, crack up, boast; come to grief.
CRAMBE, game of crambo, in which the players find rhymes for a given word.
CRANCH, craunch.