cosmogeny vs astrophysics

cosmogeny and astrophysics both are nouns.

Word	Noun	Adjective	Verb	Adverb
cosmogeny	Yes	No	No	No
astrophysics	Yes	No	No	No

As nouns, astrophysics is a hypernym of cosmogeny; that is, astrophysics is a word with a broader meaning than cosmogeny:

cosmogeny: the branch of astrophysics that studies the origin and evolution and structure of the universe
astrophysics: the branch of astronomy concerned with the physical and chemical properties of celestial bodies

cosmogeny (noun)	astrophysics (noun)
the branch of astrophysics that studies the origin and evolution and structure of the universe	the branch of astronomy concerned with the physical and chemical properties of celestial bodies