C words

cha cha
clever
cleave
cleaver
cage
cgaed
carriage
crony
continue
contribute
concatenation
concoction
cyclotron (6MeV Cyclotron in Rez near Prague) 
coordinate
coordinates
coordination
coordinator
complex
complicate
complicated
complication
confirm; re-confirm
confirmed; re-confirmed
confirmation; re-confirmation
contract
contracts
contraction
contractor
clinic
clinical
clinicals
clinically
caveat

A caveat is a warning or admonition. It can also mean a detail or condition to be taken into consideration while doing something. http://www.dailywritingtips.com/word-of-the-day-caveat/ion

crack

The term "crack" means the action of removing the copy protection from retail software. A crack is a program, set of instructions or patch used to remove copy protection from a piece of software or to unlock features from a demo or time-limited trial. Sometimes a person will write a crack to show that they are smarter than the copy protection scheme. There are also crack groups who work together in order to crack the software. Source: http://www.crackserialcodes.com/crack-lecturemaker-2.0-serial-keygen.html

crap
crapulous

crapulous: “sick from too much drinking,” from L. crapula, from Gk. kraipale “hangover, drunken headache, nausea from debauching.” The Romans used it for drunkenness itself. English has used it in both senses. – Online Etymology Dictionary

coprophagy (Malay makan tahi)

coprophagy: the feeding on or eating of dung or excrement that is normal behavior among many insects, birds, and other animals but in man is a symptom of some forms of insanity