convoke,call together/summon
convoluted,complicated/coiled/twisted
cord,twisted strands
cordial,warm and sincere
cordon,line (of police acting as a guard)
corporeal,physical/of or for the body
correlate,have a mutual relation
corroboration,additional/strengthening evidence
countenance,to favor or approve of 
counterfeit,forgery
countervail,counterbalance
covert,disguised
covetous,eagerly desirous
cower,crouch/shrink back
craven,cowardly
crease,line made by crushing/white line on the ground in criket
credulity,too great a readiness to believe things
credulous,ready to believe things
crush,press/lose shape/subdue/overwhelm
cryptic,secret/with a hidden meaning
cumbersome,burdensome/heavy and awkward to carry
curmudgeon,bad-tempered person
curriculum,course of study
cursory,quick/hurried
curtail,make shorter then was planned
cynic,person who see no good in anything
dart,quick movement/missile in darts 
daunt,intimidate/make fearful 
dawdler,person who is slow/waste of time
dearth,shortage
debacle,a breakup/overthrow/sudden disaster 
decorous,polite/decent
decorum,propriety/properness
decree,order given by authority
decry,disapprove of
defer,postpone/give way (to show respect)
deference,respect
deferential,showing respect
defiance,open disobedience or resistance
deflect,turn aside
defy,resist openly
degrade,reduce in rank or status
delineate,to portray/depict/sketch out 
deluge,great flood/heavy rush of water
demagogue,person appealing not to reasons
demur,to hesitate/raise objections 
denigrate,blacken/belittle/sully/defame 
denouement,an outcome or solution/the unraveling of a plot 
denounce,give information against
dent,hollow/depression mad by a blow