nuclear physicist vs Andrei Dimitrievich Sakharov

nuclear physicist and Andrei Dimitrievich Sakharov both are nouns.

Word	Noun	Adjective	Verb	Adverb
nuclear physicist	Yes	No	No	No
Andrei Dimitrievich Sakharov	Yes	No	No	No

nuclear physicist (noun)	Andrei Dimitrievich Sakharov (noun)
a physicist who specializes in nuclear physics	Soviet physicist and dissident; helped develop the first Russian hydrogen bomb; advocated nuclear disarmament and campaigned for human rights (1921-1989)