dysgenics vs cacogenics

dysgenics and cacogenics both are nouns.

Word	Noun	Adjective	Verb	Adverb
dysgenics	Yes	No	No	No
cacogenics	Yes	No	No	No

As nouns, dysgenics and cacogenics are synonyms defined as:

dysgenics and cacogenics: the study of the operation of factors causing degeneration in the type of offspring produced

dysgenics (noun)	cacogenics (noun)
the study of the operation of factors causing degeneration in the type of offspring produced	the study of the operation of factors causing degeneration in the type of offspring produced