jurisprudence vs Jane Doe

jurisprudence and Jane Doe both are nouns.

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

jurisprudence (noun)	Jane 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 woman who is a party to legal proceedings
the collection of rules imposed by authority