selenology vs uranology

selenology and uranology both are nouns.

Word	Noun	Adjective	Verb	Adverb
selenology	Yes	No	No	No
uranology	Yes	No	No	No

As nouns, uranology is a hypernym of selenology; that is, uranology is a word with a broader meaning than selenology:

selenology: the branch of astronomy that deals with the moon
uranology: the branch of physics that studies celestial bodies and the universe as a whole

Other hypernyms of selenology include astronomy.

selenology (noun)	uranology (noun)
the branch of astronomy that deals with the moon	the branch of physics that studies celestial bodies and the universe as a whole