astronomer vs Oort

astronomer and Oort both are nouns.

Word	Noun	Adjective	Verb	Adverb
astronomer	Yes	No	No	No
Oort	Yes	No	No	No

astronomer (noun)	Oort (noun)
a physicist who studies astronomy	Dutch astronomer who proved that the galaxy is rotating and proposed the existence of the Oort cloud (1900-1992)