S: (n) decay (an inferior state resulting from the process of decaying) "the corpse was in an advanced state of decay"; "the house had fallen into a serious state of decay and disrepair"
S: (n) decay, radioactive decay, disintegration (the spontaneous disintegration of a radioactive substance along with the emission of ionizing radiation)
S: (n) ending, conclusion, finish (event whose occurrence ends something) "his death marked the ending of an era"; "when these final episodes are broadcast it will be the finish of the show"