putrefaction

(noun) a state of decay usually accompanied by an offensive odor. Synonyms: rot.

(noun) (biology) the process of decay caused by bacterial or fungal action. Synonyms: decomposition, rot, rotting.

(noun) moral perversion; impairment of virtue and moral principles. Synonyms: corruption, degeneracy, depravation, depravity. Examples: "The luxury and corruption among the upper classes." "Moral degeneracy followed intellectual degeneration." "Its brothels, its opium parlors, its depravity." "Rome had fallen into moral putrefaction."