uranologist vs Thales of Miletus

uranologist and Thales of Miletus both are nouns.

Word	Noun	Adjective	Verb	Adverb
uranologist	Yes	No	No	No
Thales of Miletus	Yes	No	No	No

uranologist (noun)	Thales of Miletus (noun)
a physicist who studies astronomy	a presocratic Greek philosopher and astronomer (who predicted an eclipse in 585 BC) who was said by Aristotle to be the founder of physical science; he held that all things originated in water (624-546 BC)