doctor vs Avicenna

doctor and Avicenna both are nouns.

Word	Noun	Adjective	Verb	Adverb
doctor	Yes	No	Yes	No
Avicenna	Yes	No	No	No

doctor (noun)	Avicenna (noun)
children take the roles of physician or patient or nurse and pretend they are at the physician's office	Persian physician and influential philosopher; his interpretation of Aristotle influenced St. Thomas Aquinas; writings on medicine were important for almost 500 years (980-1037)
a licensed medical practitioner
a person who holds Ph.D. degree (or the equivalent) from an academic institution

doctor (verb)	Avicenna (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