physicist vs Emil Klaus Julius Fuchs

physicist and Emil Klaus Julius Fuchs both are nouns.

Word	Noun	Adjective	Verb	Adverb
physicist	Yes	No	No	No
Emil Klaus Julius Fuchs	Yes	No	No	No

physicist (noun)	Emil Klaus Julius Fuchs (noun)
a scientist trained in physics	British physicist who was born in Germany and fled Nazi persecution; in the 1940s he passed secret information to the USSR about the development of the atom bomb in the United States (1911-1988)