legal duty vs jurisprudence

legal duty and jurisprudence both are nouns.

Word	Noun	Adjective	Verb	Adverb
legal duty	Yes	No	No	No
jurisprudence	Yes	No	No	No

legal duty (noun)	jurisprudence (noun)
acts which the law requires be done or forborne	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