catabasis: the decline of a disease in a population
catadromous: migrating from fresh to salt water to spawn
atamount: any wild large species of cat

catarolysis: letting off steam by cursing
Though I was unable to fi;nd roots of this word, I did find another interesting one:
"catacosmesis" = ordering words according to descending order of importance."

catechectics: the art of teaching by question and answer
cateran: a Scottish military irregular or brigand
cathisophobia: fear of sitting
caudal: of or pertaining to the tail
caulotaxy: disposition and location of branches on a stem
cautelous: treacherous; cunning; wily; cautious
cavil: to raise trivial and frivolous objections
ceilometer: instrument for measuring height of cloud ceiling above earth
cellarer: monastery official in charge of provisions
celtuce: lettuce with an edible stalk
cendal: silk fabric resembling taffeta
censer: vessel for burning incense in religious rituals
cep: brown edible mushroom
cephalopod: creature with tentacles or limbs attached to head
ceraunograph: instrument for recording thunder and lightning
cerebration: unconscious action of the brain
ceromancy: divination by means of wax drippings
cervelat: smoked pork sausage
cessionary: someone to which something is ceded
chabouk: horse-whip
chain: unit of length equal to 20 metres
challis: soft lightweight silk, wool or cotton fabric
champaign: level countryside or plain