cacogenics vs dysgenics

cacogenics and dysgenics both are nouns.

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

As nouns, cacogenics and dysgenics are synonyms defined as:

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

cacogenics (noun)	dysgenics (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