decadent, a. deteriorating, degenerating.--n. [degenerate].
decay, v. [decline], [retrograde], [deteriorate]; [rot], decompose, putrefy, moulder.
decay, n. [deterioration], [corruption], [decline], decadence, senescence, retrogradation, decomposition, caducity; putrefaction, putrescence, [rot]; eremacausis.
decayed, a. [rotten], [corrupt], putrefied, carious, putrescent, decomposed.
decaying, a. rotting, [corrupt], mouldering, [decadent], putrefying, carious. Antonym: imputrescible.
decease, n. demise, [death].
deceased person. decedent.
deceit, n. [deception], imposition, [trickery], [chicanery], [artifice], [delusion], circumvention, [guile], duplicity, imposture [finesse], dissimulation, cozenage, [trumpery], [fallacy].
deceitful, a. [deceptive], [illusive], insidious, [fraudulent], [wily], [artful], disingenuous.
deceivable, a. deceptible, [gullible], [credulous]. Antonyms: indeceptible, undeceivable.