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)
Verb
S: (v) disintegrate, decay, decompose (lose a stored charge, magnetic flux, or current) "the particles disintegrated during the nuclear fission process"
S: (v) decay, crumble, dilapidate (fall into decay or ruin) "The unoccupied house started to decay"
S: (v) decay (undergo decay or decomposition) "The body started to decay and needed to be cremated"
S: (v) change (undergo a change; become different in essence; losing one's or its original nature) "She changed completely as she grew older"; "The weather changed last night"