copious - Large in quantity; abundant.
crisp - Firm and dry (food); cool and fresh (weather)
coup - A sudden, violent, and unlawful seizure of power; or a clever and successful achievement.
counterintuitive - Contrarhy to what one would expect, but nevertheless true.
counterfeit - Made in exact imitation of something valuable or important with the intention to deceive or defraud.
contiguous - Things that are next to each other along a common border.
crash - To hit something with force, causing damage and a loud noise.
credibility - The quality and ability to inspire belief and trust.
crestfallen - Sad and disappointed, because something one was hoping for did not happen.
crater - A large, round hole in the ground caused by an explosion or impact (like a meteorite).
craze - A widespread and short-lived enthusiasm or fad for something.
crispy - When food has a pleasingly firm, dry, and brittle surface or texture.