jurisprudence vs John Doe

jurisprudence and John Doe both are nouns.

Word	Noun	Adjective	Verb	Adverb
jurisprudence	Yes	No	No	No
John Doe	Yes	No	No	No

jurisprudence (noun)	John Doe (noun)
the branch of philosophy concerned with the law and the principles that lead courts to make the decisions they do	an unknown or fictitious man who is a party to legal proceedings
the collection of rules imposed by authority	a hypothetical average man