astronomy vs physics

astronomy and physics both are nouns.

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

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

astronomy: the branch of physics that studies celestial bodies and the universe as a whole
physics: the science of matter and energy and their interactions

Other hypernyms of astronomy include natural philosophy.

astronomy (noun)	physics (noun)
the branch of physics that studies celestial bodies and the universe as a whole	the science of matter and energy and their interactions
	the physical properties, phenomena, and laws of something