nuclear physicist vs Wolfgang Pauli

nuclear physicist and Wolfgang Pauli both are nouns.

Word	Noun	Adjective	Verb	Adverb
nuclear physicist	Yes	No	No	No
Wolfgang Pauli	Yes	No	No	No

nuclear physicist (noun)	Wolfgang Pauli (noun)
a physicist who specializes in nuclear physics	United States physicist (born in Austria) who proposed the exclusion principle (thus providing a theoretical basis for the periodic table) (1900-1958)