different between degeneration vs caseation

English

From French dégénération, from Latin d?gener?ti?.

degeneration (usually uncountable, plural degenerations)

(uncountable) The process or state of growing worse, or the state of having become worse.
(uncountable) That condition of a tissue or an organ in which its vitality has become either diminished or perverted; a substitution of a lower for a higher form of structure.
fatty degeneration of the liver
(uncountable) Gradual deterioration, from natural causes, of any class of animals or plants or any particular organ or organs; hereditary degradation of type.
(countable) A thing that has degenerated.

(process or state of growing worse): decline, degradation, debasement, degeneracy, deterioration
(gaming slang): nerf

caseation (countable and uncountable, plural caseations)

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