psychologist vs Burt

psychologist and Burt both are nouns.

Word	Noun	Adjective	Verb	Adverb
psychologist	Yes	No	No	No
Burt	Yes	No	No	No

psychologist (noun)	Burt (noun)
a scientist trained in psychology	English psychologist whose studies of twins were later said to have used fabricated data (1883-1971)