gyanjyoti

cabal : a secret plot

cache : a hiding place for treasure

cadaverous : sickly looking

caisson : an apparatus for lifting a vessel out of the water for repairs or inspection

cajole : to coax

callous : cold hearted

callow : inexperienced

caluminate : to accuse falsely

camaraderie : good fellowship

cameo :  a gem with figure carved in relief

canard : a false rumor

candor : frankness and openness

debacle : collapse

debase : to adulterate

debenture : written acknowledgement of a debt

debilitate : to make weak

debonair : charming

debutante (for female)

debutant (for male)

decadence : a decline from  a superior state

decapitate : to behead

deciduous : liable to be shed at a certain period

decimate : to reduce very heavily

declivity : a place that slopes downwards