law merchant vs jurisprudence

law merchant and jurisprudence both are nouns.

Word	Noun	Adjective	Verb	Adverb
law merchant	Yes	No	No	No
jurisprudence	Yes	No	No	No

As nouns, jurisprudence is a hypernym of law merchant; that is, jurisprudence is a word with a broader meaning than law merchant:

law merchant: the body of rules applied to commercial transactions; derived from the practices of traders rather than from jurisprudence
jurisprudence: the collection of rules imposed by authority

Other hypernyms of law merchant include law.

law merchant (noun)	jurisprudence (noun)
the body of rules applied to commercial transactions; derived from the practices of traders rather than from jurisprudence	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