letters patent vs jurisprudence

letters patent and jurisprudence both are nouns.

Word	Noun	Adjective	Verb	Adverb
letters patent	Yes	No	No	No
jurisprudence	Yes	No	No	No

letters patent (noun)	jurisprudence (noun)
an official document granting a right or privilege	the branch of philosophy concerned with the law and the principles that lead courts to make the decisions they do
	the collection of rules imposed by authority