psychologist vs Granville Stanley Hall

psychologist and Granville Stanley Hall both are nouns.

Word	Noun	Adjective	Verb	Adverb
psychologist	Yes	No	No	No
Granville Stanley Hall	Yes	No	No	No

psychologist (noun)	Granville Stanley Hall (noun)
a scientist trained in psychology	United States child psychologist whose theories of child psychology strongly influenced educational psychology (1844-1924)