uranologist vs physicist

uranologist and physicist both are nouns.

Word	Noun	Adjective	Verb	Adverb
uranologist	Yes	No	No	No
physicist	Yes	No	No	No

As nouns, physicist is a hypernym of uranologist; that is, physicist is a word with a broader meaning than uranologist:

uranologist (noun)	physicist (noun)
a physicist who studies astronomy	a scientist trained in physics