doctor vs William Harvey

doctor and William Harvey both are nouns.

Word	Noun	Adjective	Verb	Adverb
doctor	Yes	No	Yes	No
William Harvey	Yes	No	No	No

doctor (noun)	William Harvey (noun)
children take the roles of physician or patient or nurse and pretend they are at the physician's office	English physician and scientist who described the circulation of the blood; he later proposed that all animals originate from an ovum produced by the female of the species (1578-1657)
a licensed medical practitioner
a person who holds Ph.D. degree (or the equivalent) from an academic institution

doctor (verb)	William Harvey (verb)
give medical treatment to
alter and make impure, as with the intention to deceive
restore by replacing a part or putting together what is torn or broken