physicist vs Bertram Brockhouse

physicist and Bertram Brockhouse both are nouns.

Word	Noun	Adjective	Verb	Adverb
physicist	Yes	No	No	No
Bertram Brockhouse	Yes	No	No	No

physicist (noun)	Bertram Brockhouse (noun)
a scientist trained in physics	Canadian physicist who bounced neutron beams off of atomic nuclei to study the structure of matter (1918-2003)