astrophysics vs astronomy

astrophysics and astronomy both are nouns.

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

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

astrophysics: the branch of astronomy concerned with the physical and chemical properties of celestial bodies
astronomy: the branch of physics that studies celestial bodies and the universe as a whole

Other hypernyms of astrophysics include uranology.

astrophysics (noun)	astronomy (noun)
the branch of astronomy concerned with the physical and chemical properties of celestial bodies	the branch of physics that studies celestial bodies and the universe as a whole