deterioration

As nouns the difference between deterioration and cacogenics

is that deterioration is the process of making or growing worse, or the state of having grown worse while cacogenics is the opposite of eugenics; the aggregation of factors, through adverse sexual selection, tending to promote the deterioration of the race.

As a noun deterioration

is deterioration.

As an adjective cacogenic is

(medicine) of or relating to cacogenesis.

As nouns the difference between deterioration and immunosenescence

is that deterioration is deterioration while immunosenescence is the gradual deterioration of the immune system caused by the ageing process.